I realized how fkn gimped he was when I noticed that my warforged fighter hireling was so much more effective that it almost made no difference whether I actually did anything other than hide and let him kill everything. I was basically just there to heal him and disarm traps/open locks/etc... In other words, I was basically his
bitch, and not the other way around.
That works OK soloing some quests, but I failed 3 times on that one with the mummies you're supposed to save from being murdered by drow. If I took the hireling and my skeletal minion, they'd always gank the mummy before I could stop them. If I didn't... I'd be killed by the drow... or unable to kill the drow before they ganked the mummy. SUCH a PITA...
I think this character wouldn't be too desired in most groups, either, although so far I've been able to keep his trap and lock abilities up well enough to perform the corpse role. So there's that... If I can get one more level on him to get Dimension Door, he'd make a decent runner/mule/trapspringer/etc.
Edit: getting stoneskin and DD made a huge difference.