On the DRK thing....
Tp for +DMG = Nice if done correctly
DMG taken for Magic Bonuses.... There is so much to say....
To make Magical WS worth it .... why can't our WS we already have be worth it? outside that yes being able to deal magic Ws DMG on a mob resistant to phyiscal DMG is nice.
To make Elemental magic worth it... We are melees not mages unless ur adding a new low cost/low cast time Dark magic spells for DDing with.
If you want to fix DRK magic or make em use it there are SIMPLE thing u can do
Stun II(Dark based would be a bonus)
Fix Absorb spells - they would all be worth casting if the duration was 3-5 mins + no decay + increased effect
Then maybe a dark based Holy which DMG is based off how much HP u have or havn't got or it could consume TP to cast as well to be balanced so the DMG is decent.
Now add those then give us a DMG taken stance to make absorbs/drains/aspirs insta cast and DRK will use magic simple as.
Btw this is just an example but read the DRK forums some more to get a better idea of what to do with DRKs magics also may i dare say it play DRK and see how useless elemental magic is lmao.