Just pick up groups... Honestly your best bets are to either a) have twilight set on a DD/sam job... and Zombie/leech/spam WS or b) come on either bst or smn and team up.
I know you're asking for shells... but asura being asura who runs 18 deep to do anything anymore? Then again I know Brix or LosNoobs used to do WoE, not sure about now...