So you all are telling me that you can't do it as drk/sch? Why does it have to be sch/drk. I don't understand that. (Don't know much about drk in general btw)
1. absorb mnd has long recast, if you can pop parismony you can speed things up (assuming you have good supply of mobs) manifestation also triples your cast time in stead of double if it's /sch ~
2. you get more strats (5 on sch, 2 /sch) and they recover faster (45s on 99 sch, 2mins on 49sch) so you might end up waiting on strat if you go drk/sch
3. if you want to do staff trial on that guy (as other has mentioned), you cant' wear the staff