Yeah, Just fun. In my city there is a Championship without rules about ITTF and is very well paid. I want get a max backspin with blade in LPThis rubber feels very dead, extremely slow and massive spin reversal. Although no longer legal for competition for 10+ years, if you still use this for fun, it works well an almost any blade. Commonly used blades are Dr N Barricade or Firewall Plus.
I use h3 50 in fore.Then either of those blades will work very well. I assume you'll have an inverted or short pip on forehand, so choose the blade that best suits that rubber, as that's probably more important.
If you want to hit with the other side, you might need a blade fast enough to hit it past the opponent.