CT is considered a dungeon, even if its an outdoor zone. Thats why you can can sow and shrink in it. Try going to WC and cast shrink there - thats a nogo!
EDIT: Although it possible now, after VI's latest nerf on shrink. :)
Edited, Thu Oct 3 12:54:38 2002
Spell Casting Mastery (SCM as mrwookie pointed out) will help you conserve mana over the long haul. It too will cost 12 AA to maxed out (2+4+6).
With the Out-Of-Combat regen system in place now, mental clarity is nearly a waste. Sure pick it up at some point, but not a high priority now.
Gear-wise, here are items you need to increase your dps. Obviously, necromancers perform DPS by casting DoT spells primarly - so our highest priority should always be ways to improve DoT damages.
Epic 1.5 / 2.0 / 2.5
These epics all ha