Hi! About the 2*. U should definitely go for Elke and Z3r0 D34d (and don't forget Mok), frankly, they are the only playable 2* in ELO since Arkn is permbanned. Bristone and Leviatonn are always good options for the 3* spots, and maybe Stalfhaust. 4*, Methane or Anibal are good choices since Draheera and Toro are banned, but Hriger is a good choice too according to me. Then the heavy 5* spot. Definetely Wardom or XU52 on weeks not temp. banned. Good Luck!
"Wurmhol is viable too"
Yeah... no, he isn't.
There is a common GHEIST ELO deck that every GHEIST deck should be built around.
XU52, Hriger, Leviatonn, Bristone, Stalfhaust, Klawz, Mok/Elke and Z3r0 D34d
XU52 can be swapped for Wardom or Ksendra (preference). In the 4*'s department you really only have 2 choices - Hriger or Methane. It's hard to pick one or the other - they both have their merits. For 3*'s you really don't have much of a choice, if you really wanted to you can swap Klawz to Chiara Cr. GHEIST was one of the clans with all round good 2*'s, nowadays they are mediocre with many counters so your really left to choose between 3 cards - Mok, Elke and Z3r0 D34d.