Darklink401
Smash Master
The only annoying thing about Pika, I find, is his height, and the fact he can edgeguard us to oblivion xD (his bair wallspikes are the devil)Pika is annoying but it's easy to lloid and fair spam, usually stay right at the ledge to be closer to Pikachu's height, nair is really good because it trades/beats quick attack.
Sheik? Idk..I think we'll know for sure when Ranai comes to the states, it's probably underdeveloped.
Villager rosa is super hard (trust me my training partner mains her), Rosa can just put up a wall of defense and gravitational pull everything, I find coming down on her with dair into dtilt is really good and edgeguarding can be easy. I'd say 60-40 at worst.
Also, I face Rosalinas every tournament I go to (sadly) and I must say, once you DO get that Rosa practice in, you just gotta know what to do, and it's not that bad
Plus, Villager's nair clanks with most of Luma's moves (including fsmash and upsmash) so we got that goin for us XDD