I think the 90 is the way to go. I tried the 45 and it didn't give me any good impression to be honest. It's okay but like just okay really pales to how good the 90 is.
Recently I've switched to MX-S on BH and to Donic Bluegrip C2 on FH.
MX-S is is more spinny than V>15 without a doubt, and I guess safer to use, or it can be utilized more. MX-S is more like a Tenergy 05 while V>15 Extra I would compare to Tenergy 64. MX-S has more spin, better arc, if you're out of position you can do more to put the ball on the table with decent quality. I kinda feel like MX-S is harder a little than V15>Extra. One particular aspect that MX-S destroys the V>15 is that over the table stabs or not sure what to call them are excellent. It keeps the ball very low and gives a disgusting amount of underspin with a quick little stab. V15 cannot do anything like it.
V>15 is more like a "magical" rubber, if you can hit hard and make the ball bite well... damn this rubber is super impressive. You can hit so hard that even against choppers killer backhand shots are totally in the game. With MX-S not so much I guess, it's still pretty good tho, but it doesn't have this kind of magic.
Probably the over the table stabs bring more points in the end than magic.
Donic Bluegrip C2 is a strange rubber. I have tried it on a few blades like Joola Trinity, Xiom Ice Cream, but it was so dull, powerless, and gutless on these that I benched it pretty quickly. It didn't do any favors for the C2 that after an hour of play I could see marks on the sheet, while other rubbers take a lot more time to develop visible marks of use.
Just for lolz I tried it on my ZQ Super ALC and damn the C2 performed great from the start. On strong impacts the ball felt heavy like hitting billiard balls. I could feel the blade deforming and flexing really well. The topsheet is quite spinny actually but on the same time it's not that spin sensitive. Very good for countering from any distance. The C2 is a very good mimic of a boosted H3 blue sponge. Bit easier to use, countering is much much better, doesn't have the Chinese tacky disturbing effect tho. It's very nice for touch play, countering (well I guess C means counterspin here as well), and it's very nice for fast attack too.
If someone knows me a bit more they know I'm not a huge ESN rubber fan... But MX-S is really good on backhand, and if someone likes Tenergy 05 on forehand then it would suit them well too. Honestly speaking it's more like something in between T05 and D80 by feeling.
I had nothing against ESN hybrid rubbers, I love Tibhar K2, Rakza Z EH is pretty good too as I mentioned before, C2 is better than these for sure and I'm not sure Donic Bluegrip C2 is the best offering from ESN in that segment. I am kinda curious for Tibhar K3 and Andro C53 and C48 or possibly Victas V>20.
Just to have more relevant info for the ZQ Super ALC, in my view it pairs great with hybrid rubbers and possibly rubbers that are Tenergy and Dignics like. And as MX-S feels like something in between Tenergy and Dignics it is great.
This blade is not like Viscaria, I have tried at least 20 Viscarias, 20 Timo Boll ALC and many Zhang Jike ALC, Blue Dragons and Timo Boll Spirits.
ZQ Super ALC has more control (lower bounce) on low impacts, and it scales very well with power unlike a "good" Viscaria. And the best feature of this blade is that on high power it deforms extremely, flexes as well and has a unprecedentedly long ball contact and heavy ball feeling which enables you to adjust your racket angle during your contact.
I don't even want to mention that due to this long contact time it gives you a lot of confidence and gives you a pre-image of how your shot will end up with the power and racket angle you decided on at the shot. Like this feature makes me sound like I am in cuckoo land but I can precisely feel during each mistake what I did wrong. I realise that is like a coach kicking me in the ass after every mistake I made. If that is not the best value you can get out of an equipment then I don't know what is.