Can't trip while weilding ranged weapons and my rogue is not particularly strong anyway. I bet that a scrolled comet fall isn't going to do much against a lev 17 elite mob. I need to try that though...
This is what I was trying, but the summons / hirelings all agro on the patients trapped in the cells. Trying to get them to focus on the mindflayer is futile. Also hard to get a summons that can hold agro even for a few seconds whilst I'm backstabbing, especially as they're not much more resistant to mind blast/hold/dominate/dance than I am.
Where's the fun in that? :-P