My set for umbreon seems to get better
Umbreon
Adamant(can possibly work with brave too) 252hp 252 atk 6?
@ Leftovers
Charm
Black out
Payback
Sucker punch
(yawn can be one of the supportmoves)
Last gen this set got my Umbreon to beat loads of Gyarados users expecting that it would try to wall or something, so they either taunted or DD'd
Meaning a free Payback, then they "catch on" and attacked, meaning base 100 STAB payback> sucker punch= KO'd Gyarados.
I remember using a similar Umbreon when I first got into the Metagame. I'm not certain how well I'd work now, but the idea was to wave around Sucker Punch so your opponent knows you have it and switched in a Setup sweeper, then slap them with Toxic and laugh as they wince at their pokemon's newly acquired expiration date.