Right, so I decided to have some recent first hand experience.
I've popped into the hole
on my 52 sk (click for Magelo - is missing many of the later spells).
I'm at zone in, splitting using dooming darkness and the zoneline (perhaps I should be using the free FD from BE greaves instead? Zoneline seems superior cos i can heal a bit out of zone and I don't take hits from add this way).
I start the battle with sword and board, cast siphon strength, shadow vortex and shroud of hate then switch to Reaver, casting Lifedraw between swings. If I remember I precast major shielding and vampiric embrace. Once the mob is at about 40% I cast dooming darkness and then invoke fear, which makes the mob flee on the spot. I'm finishing fights with about 40%hp 20% mana remaining.
Occasionally bashes are interrupting, but these are usually due to the improved knockback/interupt chance rather than stun.
In short, race doesn't seem to matter in this instance against these mobs with this gear. Xp would be faster on a smaller race, but I'm in no hurry. BnB in SolB may be faster, especially if using the bats zoneline and a short duration fear to kite.
Question: in these fights is it worth using heart flutter, etc in addition to the stat taps? The NPC is generally winning on %hp while getting the debuff taps set up. Should I even bother with the stat taps and just spam reaver / life tap for the win?