-grim
while i don't think lum is that great, particularly because all it offers over shed skin + black sludge is intimidate as the ability and a tad more consistency, i think it is better the other options presented. scarf is a gimmick that can situationally lure things but is disappointingly weak and frail, crunch is decent enough but without sucker punch arbok has next to nil use against offense due to its frailty, and payapa is average because you take a lot of damage anyway (limiting its effectiveness after prior damage) and most of the pokemon it is useful against are targeted by sucker punch (while you can point out sets like colbur grumpig and sash kadabra, as the sweeper arbok is without plentiful setup chances against offense, it prefers to have these sorts of 'iffy factors' out of the way before it starts to set up.