I mean... does Ymir have any telepathy resistance feats?
Presumably, since he's fought Odin, whose TP is formidable enough to go toe-to-toe with Galactus for a good while, I assume Odin at some point must have tried it on Ymir, but I don't recall ever seeing any feats on panel for Ymir related to telepathy.
Still, given his nature as a deity, I'd assume he just flash freezes the Cuckoos right off the bat whilst no-selling any mental assault they launch... but that's only with the assumption his mind is unassailable by the likes of the Cuckoos.
Maybe if this were Warsong Cuckoos with fragments of the Phoenix Force empowering them, they could break through his defenses...
classic forum stuff 馃槀 ymir is near odin level. we've seen odin's tp. do we assume odin was dumb whenever he faced surtur and just never realized ymir could be put to sleep so easily? do we assume loki could take ymir as easily? surtur doesn't have any tp feats either. does lt? cuckoos would make for aa perfect new lt. 3 faces! 馃憜