Staples: Lola, Elvis and Melanie (?)
Lola - My favorite card of all time. If you know how to pill properly, she can save you pills and pseudo-DR like a boss. She is THE reason to play Berzerk alongside Elvis, as she has so much potential to completely change a game. Most noobs just let her die to a spiaghi to gain life advantage, but the real beauty is either calling an opponent's 1 pill bluff or letting them think you would heavily pill her.
Elvis - Another reason to play Berzerk is their incredible SoA in the form of Elvis. Bogdan is banned very often, and when Berzerk starts getting more diverse so will Elvis, so use him while you can . This card is virtually better than perma-banned striker (more solid power is better than more solid damage) and is better than Bogdan in some situations. Immense 8 power, more than decent 6 damage, SoA, why wouldn't you use this card?
Melanie - Some may disagree, but I find Melanie an absolute staple for this clan. Cards like Wardog, Wanda etc. are very powerful one of them has been permabanned on and off (yeah yeah, level 1 use w/e). Imagine that with immunity to Caelus, Robb, AS, Olga, Mona ,Blaaster etc. (you notice that most cards that are ELO banned are power reducers.) Unstoppable 8 power unless against Toro and Platinum (only ones I could think on top of my head)
Other Options: Cortez, Taylor, Revok, Kawamashi, Norman, Kostner Gus