Talk:The Derp Crusade (Ask to Join!)/@comment-4107522-20170214203854/@comment-25627885-20170214230131

Chaos powers are rather diverse and with less risk, so they have that over the powers of the warp.

Add in the fact that the planet is unfamiliar territory, so Mobians have the home field advantage; they probably know the terrain and I'm not sure if the dusk owls stranded hear came with any siege equipment for long campaigns so there's that; plus the afformentioned ammo crisis as they are probably cut off from any supply lines via Dark Mechanicus.