W Cyclops assist is if you use her abilities, she'll get a buff which is then consumed when you have enough, on whichever next ability you use.
e.g. if you use Abi 1 > Abi 3 > Abi 2, then Abi 2 will have an increase effect like 1 turn longer Zeal (3T)
if you use Abi 2 > Abi 3 > Abi 1, then Regen will be 1 turn longer (3T)
and if you use Abi 1 > Abi 2 > Abi 3, I think the ability DMG just activates twice, similar to Ra's ability after she bursts.
It's nothing too special, but it's unique, so that's something.
600 Regen for 3T is pretty nice.
and her Zeal is, iirc, 10% BG / -700 HP ...so she is pretty fast, and if you use her regen last, you gain back more HP than you lost anyway.