They don't seem to be resistant to any particular damage or type. Magic based spells generally stuck after Tashania from 46th Enchanter(me) and Malosi from 50th shaman. The other 3 in the group 50-53rd Druid, Cleric, Ranger. The Shadel Bandits hit for 140's as a minimum as I well know and top out at 171. Guesstamation by our damage output would be a few over 10k hps. The nearby lookouts closer to 7-8k hps. They took everything they should as if they had standard resists. Recommend the charm tactic if you have a Bard or a 53d Enchanter with Agacerie. Bard is less likely to die on a failure though they do take the stun line well. The new lull upgrades may make single pulling possible. No harmony in FG, indoor zone.
Beware the Lotus while your there! It's indifferent, but looked like a good opening target. (our test for zone basically) Took longer than the bandits, summoned and cast magic based 450DD's. I stun tagged it mostly when it cast, but it took over 5minutes to finish it even with 5DoT's running the whole time, constant nukes, and Aeliel the tanking Ranger hitting it for 120+ average damage a second.
Lovely place. No rings, but got a spell and only killed 2 of us when we got a pop with the usual two we pulled at a time. Took us a while to find Balroger's body since he looked like a dead giant mushroom. Those little mushrooms are interesting.. heh. Have fun!