There was a reason cha was a dump stat.
Str = (damage) (hit) carry capacity
Dex = AC, Init (hit) Ref
Con = HP, Fort
Int = Skills (save DCs)
Wis = Will (save DCs)
Cha = (save DCs)
twin strike with long swords + quary
1d8 + 1d8 + 1d6 = 12.5
homebrew monk fists + sneak attack
1d6 + 1d6 + 2d6 = 14
It's more damage, but.. you only do half damage on rounds where you don't have combat advantage.