The thing is - it depends on meta I have a lot of arcanist players here, mostly Sandeep, Rasputina and Ironsides ( i think all of my last 5 or 6 games was against arcanists, and each time it was a different player ). Frozen heart is hard counter for Seamus, Ironsides with mages and wards is also pain in the ass, and Sandeep is Sandeep. Still, because i think Nico and Reva are boring, both fluff and gameplay-wise (Reva especially), and i'm not that focused on competitive playing i play mostly him, McMourning and maybe Molly. From masters that nomoredroids mentioned i think only Lilith and maybe Lynch are kinda regulars here, and thats also not in this "top tier" of players. Titania and Von Schill i've seen played only for fun, and maybe in really specific match-ups on tournaments.