It is interesting that you seem to favour the P500 blade over all others and the converse seems to be true of the TSP balsa blade, aying that it tells you something?
P500 is a looping blade. You said the main part of your game is trying to loop with FH and BH. P500 is thin and flexible but still not slow. If your mechanics are good, you can make very powerful, very spinny shots with a P500. Kong Linghui won the World Championships with the P500 before Butterfly signed him and made a blade that was an imitation of the P500 and is also an excellent blade. Too bad Butterfly no longer makes their original Kong Linghui blade. It was a really nice blade.
But, of the other blades I mentioned--Acoustic, Virtuoso Plus, Korbel, Stratus Power Wood--those are still looping blades but they are a little faster than the P500. Any of those wood be good as well.
What characteristics do I say make them looping blades. They are relatively thin. All are all thinner than just the core of the TSP Balsa 6.5 blade. So they have more flex. They are all wood so they will give you more ball feel, help you hold the ball on the blade face longer, help you feel the distortion of the topsheet when you grab the ball, and therefore they will help you generate more spin. And they are all fast enough. Anyone with solid technique whose legs, hips and core are timed well to the whip of their stroke will be able to make evil loops with any of those blades.
The Balsa 6.5 is a blade that is best suited to slapping the hell out of the ball. It is thick, stiff (the 6.5mm Balsa Core ensures that). The fiberglass also ensures that it is stiff. This makes it so the ball rebounds very fast off the blade face which makes it hard to hold the ball on the blade face. If you played a lot of flat hits, slap kills, smashes or played with Short Pips, the Balsa 6.5 would be ideal. That you are not feeling that you are using a blade that is great for direct contact but makes it notably harder to generate more spin in loop/counterloop rallies tells me, either you are soooooo good that you should not be asking anyone for equipment advice and should be a in the top 50 in UK. Or, that you cannot tell that the equipment you are using is not suited to the style you at least described as what you play.
Either way, a blade that is good for looping would be quite okay for the crazy advanced player or the player who is developing skillz.
By the way, it is very common for mid-level (intermediate level) players to use equipment that is too fast for them and hinders their progress without knowing and they get used to that and then something that is actually a suitable speed feels too slow because the fast blade made it so they did not have to learn how to put the power of their body behind their shots. This is very common.
As far as recommending rubbers....I am of the opinion that, without seeing you play, any offensive rubber from any company should be fine. The list Konrad Bak left is good. Close your eyes and choose. They all will be fine. Dignics 09C? If you want to spend the money, go for it.
Have you ever played with boosted H3? Regular H3 Boosted may play sort of similar to D09C if it is the rubber I think you mean. I also think it would be worth you trying Dignics 09C before buying it. You should see how these rubbers (both D09C and boosted H3) play on someone else's setup before you spend all that money on D09C or any other rubber. It might be amazing. But it is a very specialized rubber.
I would really say that about almost any blade or rubber. If you can get club mates to let you try their equipment for a few hits for several months, you will know better things that feel good to you. Unfortunately, as stated above, sometimes what feels best to someone is not exactly what will be best for them.
But at least you are making choices based on having felt the equipment rather than on someone writing something on the internet.
Reading reviews and descriptions of equipment on line can get you caught up in buying a lot of TT equipment you did not need. It could also get you thinking something about equipment that is not very accurate. Some of the variables from the people who write equipment reviews on line:
1) You don't know the level of the player, and frankly, a player who is not very high level may not be able to feel half of what a piece of equipment gives them or doesn't.
2) It is hard to tell if the person writing the review has had experience with lots of other equipment or if they have not.
3) What one person feels is usually nothing close to what you will feel from the same equipment because everyone's senses are different.
Online reviews are great for the TT companies for getting people to think they need things they don't. So, in one sense, if you can afford it, that is fine. But in another sense, that is a problem because it means people end up with equipment that does not fit their needs without the person being able to tell that what they have is not suited to their needs.
Without seeing footage of you playing, I really can't say much. I really could be totally right or totally wrong in how I have interpreted what you presented. But the base level of any of those looping blades I mentioned, including the slightly slower ones from the earlier post, with a mid soft/mid hard offensive rubber that is middle of the road, is all that most amateurs need. And I know some high level pros who still use just that. So it can't be that you are too good to use equipment that is designed for looping.