With Sharn you can hit 80ish main stat fairly reasonably on a first life toon; compared to 120+ on his (probably) PDK toon, that's a 36 DC loss immediately (20 + 10 DM + 6 CKT), assuming the first life toon is also PDK. PL's give 9 DC's, and Reaper Points give another 4 DC's. That's already ~50 DC drop XD
Full gear 1st-life PDK w/DM I'd expect could hit 110-120 or so, ballparking.
PDK+Trance is something some melee builds can use, but there's a lot of builds that can't for various reasons. Also you're stuck with a Cha-max melee :P