Dalkain's rings (I have 2) seem to give me a rather large bonus to my FD chances.  However due to the difficulty of changing equipment sometimes once you have engaged a mob in APW, I only use them when dragging a healer's corpse or something.

As for holding spell casters, if you have a sorc to cast reflective runes on you I find that helps, and failing that a reflection granite carving does the trick pretty well.  I generally do that if there is not some corner/pillar to hide behind while the mob is inbound.

Matriarch Marlisk... dont remeber the name of the dungeon but its straight east/ne of agrahm