Alternative 1.Try having high enough med/conc to be able to compulse and keep spelled up an army of 4-8 of the strongest NPCs in the area that you pent.
Every 25 odd minites transfer them and start again.
If you only select the strongest and spell them up then they will never die and you also earn all their kill points.
Less than 4 and you can get swamped - and hence need your C2.
More than 8 and you lose track of who you have spelled up and hence lose kill points.
Alternative 2.Just compulse the blazes out of everything.
A massive army will be formed that you can leave behind you "wait".
You will start to pent faster but will not earn much from kill points.
Alternative 3.Stealth, perception, stun and run.
I can not say that I was every any good at this one but some people swear by it.
Fast solves but almost no kill experience.
Having said this, I have never been any good at Mercs, Sorcs or Warriors ....