WHM is one of the better jobs for doing Bastion, what are you talking about? Don't do resistance ops, they suck. Do the actual battles. I did it in Misareaux, basically I'd put up RR3, and Diaga everything as it comes in and kite it around. As NPCs stole hate from me (they're suicidal), I would stop kiting and start blasting Cure IV on them all trying to get hate back. As hate goes back to you, just start spam-curing yourself. If you die, don't worry about it, just get up and resume. The resistance credits should flow like a river.