Thank you for your opinions.
I expected the comments that Viscaria and MX-P is too fast and advanced for my level, perhaps you are absolutely right. My experience is limited to these two blades and these two rubbers. When I was playing in a club for a few years I was not proactive to test other people's equipment, and therefore just don't know any better. So, take this ignorance in context when you notice me expressing an opinion or a feeling about something.
Perhaps if I give the context of how I grew the way I am, the discussion will be more productive.
My introduction to proper table tennis was somewhere around 2012, when I was playing outside at a holiday resort and some dude brought a blade with Andro Rasant. I remember well that sweet rubber click, and the special Andro sound when you get a good spin with it. I had no technique whatsoever and played some pre-made Butterfly bat that became complete anti-spin with time and sunlight (and yes, usually there is no roof on outside table tennis tables, and yes, you play under the heat of the sun sometimes -- those who wanted to play didn't mind it
). He was surprised how well I was able to do fast flat strokes, in which I put all the power and which was my winning strategy. So, he suggested to teach me a bit of proper tennis, so we found some cheap premade bat which had grip, and we trained for about 3 weeks every day. I think it was the time when tensors just started to get popular. So obviously after I came home I wanted to have a bat like him, so I looked at what Andro had to offer, and of course it had to be a tensor rubber
After that I found a local club and played some Sunday tournaments for a few years. And yes, I remember playing against defenders and not being able to finish the point in 1-2 shots, which is what I was used to from playing with anti-spin rubbers just smashing flat balls at almost any height as hard as possible. The Rasant Grip rubber generated a lot of spin, but I had to choose: either I play for spin (opponent makes a mistake in not closing the bat well enough during block) or for flat power (opponent cannot react to the ball at all), something in between was countered easily by opponent. And I wanted both, since going 100% on one or the other was too risky and led to me loosing against myself.
I don't think I've changed the gear all the way untill I bought Viscaria and MX-P about 2-3 years later. It was a different place, different time, I started noticing that the Donic's rubber is loosing grip, and I also wanted something more "professional". Reading that is was stiff (blade) and fast (rubber), I thought that it should suite my hyper-aggressive play style. In retrospect, I would say I wasn't wrong. It gave me both spin and power, I was able to finish the point with 3rd or 5th ball pretty often. Obviously, I missed pretty often too, as the bat was pretty unforgiving. But at least even when I lost to myself, I know that I am in control of the situation, and it's about me improving to hit better, and not just looping the ball medium power waiting for the opponent to make a mistake. This might be a psychological issue, but that is beyond the scope of this discussion: I want to either win or lose myself, and I am okay with that currently.
I would say I have a decent forehand topspin, and I would say can put a lot of body power into it, so no, I don't think it was an attempt to cover weak stroke with faster equipment, it was more like "I want this, but even faster/more powerful", as I wanted to come back to "impossible to return" shots that I liked to do during childhood. Perhaps I can record a video with forehand topspin for you to judge in a few weeks. Backhand one is very bad, though, as I did not undergo formal coaching, and whatever I self-learned is not good enough. However, remember the first paragraph of this post -- I might have indeed "not mastered the blade", I just don't know any better.
The good news is, I am going to undergo formal coaching (in a group, but regardless) starting next week, as I again feel the passion for table tennis. Henceforth, replacing the practically dead rubber now. This month was my "warmup" outside, I am going to play inside now. Although it's unfortunate that I had to kill pretty expensive rubber with sunlight not knowing any better. Anyways.
Just a few words regarding these two blades and rubbers that I have, and what I think about them. They are indeed surprisingly similar, I guess hats off to Donic, as its price is much lower. With rubbers Viscaria weights 179g (without stripe, with stripe it was around 182g), Donic -- 177g. The sweet spot is bigger in Viscaria, it doesn't absorb incoming kinetic energy, I don't feel the ball as much (not in a bad way, quite the opposite, I like it this way, with a little bit of vibration, I can ignore the speed of incoming ball, I don't feel the energy being eaten away by the wood). The weight balance is better on Viscaria, but that might be due to the fact that I have both rubbers in 2.3 (I think, or in 2.2, in the max thickness anyway) and Donic blade was not made for heavy rubbers. Viscaria also requires me to hold it properly (has wider "ears"), otherwise it's uncomfortable (which is good), Donic one is comfortable to hold even in "half-hold" (has smaller "ears"), which leads to inconsistency in shots. Donic bat is better at short pushes and control in general. But when the rubbers were new, even that was rather poor because of how tensor catapult likes to throw the ball out. So yeah, I pretty much just gave up on precise short game, usually going for aggressive pushes and falling back to counter-spin opponent's topspin.
So again, since I've only played with tensors, I don't know any better. I also don't know if I want to know. I think I like this strong catapult effect, even though it can lose me the point if I don't play a stroke with correct ball contact point and bat angle. Softer rubber on Donic is much more forgiving in this regard, but I think I can "just" improve the stroke instead.
And now to the pragmatic part. I have two blades. I like how Viscaria plays more in all regards. I am not planning to spend on another blade. So yes, even if it's too fast for my current level, this is the way it will be for now, I think I am teachable enough to become efficient with it.
Back to the original topic of rubbers. Firstly, I myself layed eyes on Nittaku Fastarc G-1 as it is reported to be more durable compared to alternatives, and in characteristics it is similar to MX-P. From your suggestions my shop has Coppa, Mark V and Hexer Duro. Now, I have to ask do "classic rubbers", as you call them, have the same catapult effect? That is, if I drop the ball on the rubber, how high will it jump back? If I drop the ball on an almost dead MX-P, it still jumps almost to the same height it fell from, and continues to bounce for quite a long time, 5-8 times, until full stop. I assume Hexer Duro has similar behavior. What experience will I get with classic rubbers? Perhaps you have a better way of describing the characteristics than in my example. All these rubbers are pretty much of the same price, so money-wise it doesn't matter between them. It's just that I am not willing to pay megabucks for the Butterfly rubber.
I also forgot to note, but I think I want a very grippy rubber, if possible. So for example, when you do a popular exercise where you put the bat at around 10 degrees and throw the ball with your left hand into the bat horizontally, and the ball goes vertical and starts spinning a lot, and then on the second hit I want to be able to put the bat at around 80 degrees and still have the ball jump vertically (instead of falling over to the side). I remember that some new rubber performs just like that. Currently my rubber can only handle no more than 45 degrees. So, I want to be able to pick up the balls at the very steep angle. Why? Firstly, for backhand flick. Secondly, I prefer to play "forward" with forehand topspin with closed bat (bat almost parallel to the table), it helps with playing very spinny loops in a powerful way so that the ball flies fast. If the rubber doesn't catch the ball at steep angle, the ball just falls off the rubber.