What if, instead of all or nothing win or lose, clashes were compared coin by coin? Of course, this would mean that skills with more coins got more hits in, but low coin skills usually roll higher so those would win more often.
And because this is now coin by coin basis, it would be good to change coins from just something like +3 to a range like +2...+5. Sanity can stay, but lessen the effects of coin rolls and make high sanity give different buffs, + to coin power, protection, lifesteal. Different IDs could have a differrnt set of buffs they get from high sanity
I think this would breath some fresh air in to the combat system and