Thrill is the best counter to Futile Resistance, Firefly is a great defender, and I've got a soft spot for Parasite Weave since her stun usually allows for a double ground combo.
The list may be long but I'll name some.
Epic Sax, he is more buffed now
Ultraviolent, 75% extra damage for armoured or flinching opponent
Primed, the name is enough
Bloodbath, same reason as above
Purrfect Dark, the mother of all curses.
And there are many to go.
Post the fighters you have, for more accurate suggestions.
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