warrior necro can make a pretty good offensive character and a potentially better self healer than a warrior monk

presuming youre tanking effectively and holding the aggro you can make
very good useof death magic

main tactics i use are...to hold a big bunch of enemies and keep them diseased
if they are fleshy targets..due to a nice spread of conditions around you
a victory is mine shout can give you the the equivalent of a monks infuse health
plus full energy again to repeat the process...along with a few stances and axe/sword skills in between to keep your dps and defense up

again if youre holding the aggro a nice putrid explosion will hit hard when an enemy dies nearby..alternate between putrids and soul feasts/consume corpse to damage and survive (as long as theres no MM in the team)

the ability to cause aoe weakness and reduced attack rates using curses would be the alternative..combine that with stances and youll take next to no damage
plague touch is sweet and spammable to get rid of all the conditions that pile up on you.

necro is a pretty sweet 2nd for a warrior who wants to damage as well as tank