my combination for ruin contract is to run 押し付け (Press?), play the card, then press it on the enemy. With boobjobs from prehistoric I can guarantee one way or the other im going to have enough to run both cards at once. Since the target for ruin contract can't be switched you can just press it on the enemy right after playing and let them have it. No will or other shiet involved.
I think it's a better fit for wisdom though because of the whole lust crest = strengthened vagina attack
Wisdom comes with Will though. Pressing wisdom doesn't help you.
Wisdom is a good secondary squeezer in a ruin deck I agree.
But yeah, I didn't think too much about press... Pressing a harapeko inma with ruin would be really powerful!
EDIT: Seems like the double pursuit bonus from Ruin contract doesn't stay when you use swapping or pressing.
EDIT 2: Made a pretty consistent wisdom deck. With the buff to flock of goats a while back it's even got some defensive measures against kidnapping.
CS001=2,CS005=2,CT003=3,GD010=3,MC001=3,MC004=3,MC005=3,MC007=3,MC008=2,SC001=3,SC002=2,SC003=2,SC005=3,SC006=2,SC007=2,TC004=2,p=SC003,n=WisdomButMostlyDisappointment
EDIT 3: FINALLY I got the Ruin Contract deck to be good.
CS008=2,CT003=3,CT007=1,CT009=2,CT010=2,GD010=3,GD016=3,MC004=3,MC005=3,SC000=7,SC003=2,SC005=3,TC008=3,TC022=3,p=SC005,n=Risktaker
It actually defeats most other decks at a reasonable rate. It's weak to the heavy heat card, and dragon tho. Also... well... hmm... you should turn off animations if you're gonna play Risktaker. The animations never end.
EDIT 4: And... I got a generically strong deck that uses the Cheer girl. It also has a very doable secondary win condition of boobs save the world.
CT010=1,GD002=3,GD004=3,GD009=2,GD010=3,GD016=2,GD018=2,MC001=3,MC007=1,MC010=1,MC012=2,MC013=2,SC001=3,SC002=3,SC005=3,SC007=3,TC004=3,p=SC007,n=Fight On!