>>543983059
HMG
WASP / Spear (main challenge is mostly conserving ammo)
RG
Speargun
AC
ABRL
All of them paired with EATs / Commando
Want a fun "challenge"? Don't pick any support weapon. Find a RG, Arc Thrower, MMG or Flamethrower or wait for a teammate to drop / lose one. Not much of a challenge because by the end of it you're pretty much better off than your teammates, but the first few minutes are fun primary weapon gameplay