I would actually say, if you want top quality, Tenergy is really a notch better than everything else and you know the price so you may as well get the best. I personally feel that it is worth not messing around with rubbers. When you really know equipment you will be able to make more subtle decisions for yourself. But Tenergy does everything a little better than anything else. There are rubbers that do certain things better but none that do everything better.
A standard setup for a player would be T05 on FH and T64 or T05FX on BH.
But earlier you said that FH too fast and BH not fast enough on one of the setups you tried.
So maybe T05FX for FH and T64 for BH. 05FX is a little slower T64 is faster.
By the way, one of the reasons the top Chinese players use Black for FH is that it makes it a tiny bit harder to see the contact on the serve. There are other reasons but that may make it worth having the black rubber the FH rubber even if you are not using DHS rubber.
Cool, then let's discuss those rubbers things a bit too.
First of all, i always or get used to use black for FH, i used 4 blades from so cheap to normal or good and i always use black side for FH, so i want to stay this way.
Second, i remember when i tested that blade and i can't remember which rubbers are against the coach, he asked me to use red for FH and black for BH, so if that Tenergy was used for both sides, then both weren't good for me, unless i use Tenergy 05 on BH so i can give it more speed, but it was Tenergy 05 black on that BH anyway, but in general, the blade i didn't like, and the racket was almost used to death, so maybe it wasn't good for me that time and i can't base any judgement on that test practice as i said.
3. If i still remember very well, in the past most of my winner shots were from my BH more than my FH, and i do slice a lot and here i also depend on the BH for that more than FH, and for FH i try to use it for med-long distance because sometimes i lose more points with FH when i am close to the table, so i go back to adjust the speed or long loop or whatever with FH, but i do slice with FH when needed.
4. Thickness of sponge, does it matter? maybe the blade i tested was a bit heavy and it was, so that i couldn't control it or even i wasn't happy ot comfortable to use it even for 1 minute or less, at the end it was belong to one of national team players and he must prefer heavy for reasons, but is that heavy came from the rubbers or the blade?
I wouldn't mind to stick with Tenergy, there are 3 models you and i look at, 05, 05FX and 64, i wouldn't mind to use any.
Also, i still can buy from online, so if Tenergy isn't recommended for FH or BH then i can look for rubbers online, but i think Tenergy are high recommended after all, and sure quality is always most wanted.
I said Tenergy 05 for BH because it sounds it is really suitable for most strong fast BH strokes, and i do that frequently, so i don't want to look anything less, and i thought about black Chinese specially DHS rubber for FH because major of top players are using that on their FH, so they know it is good after long time or run and they experience and level, so i have to put those rubbers at best use if i can use it, but if those Chinese rubbers are not that much recommended i can easily ignore or pass it and look for something else.