FO with decent speed can solo it much earlier than G11 if it's the right team:
KRU, FOO, FOE, FOST/Phasma/Kylo (pick two). First three are needed and can even solo it on their own.
Above G10 you should be able to solo without the Rancor or pigs taking any turns at all.
Benefits are: no legendaries required (but get you a legendary instead), capable at low gear, very little reliance on RNG, almost impossible to screw it up, and incredibly fast on auto once modded and geared up (8 ish minutes). Oh, and they can almost solo P2 of the HAAT themselves.