On "THIS" map, the one we're talking about. I found that leaving or moving too far away will reset the Boss and reset the map and may/will cost you your hard earned map. This map can be a handfull if you're never gotten it before, just like the bomb map. Both in my eyes are TROLL maps, meant to "steal" away your chance at a alex. Being overgeared (item level 100-110) for both the Bisclops and Bombs map(s) seems to clear up any or most problems you may be having. This has been my experience.
