The only boost gree should give should be
Health time reduction
upgrade time reduction
upgrade cost reduction
building upgrade time reduction
+1 building upgrade mod(not through ltb preferably)
stamina regen boost
energy regen time reduction
building payout time reduction
building output boost

No more attack boost please that crap is annoying not knowing what your actual stats are is annoying and finding out at the end of the cycle that you aren't anywhere near what you think you are is a total disappointment, specially for low level players.

it would be better to only give temporary boost for things that dont effect actual attack and defense stats.a