Why Speed Pulls?

[Xenosan]

... Heavy Thrust + Ring of Thorns is more effective AoE than Doom Spike regardless of numbers...

My approach would be Bfb + life surge > Dragonfire, internal release > doom spike till bfb wears off or maybe 9 sec to land a thrust combo, continue rotation single target rotation on targets

Long animation.

If no one's said anything to you then rock n roll. At least consider RoT has a ridiculously long animation time, and does absolutely dismal damage without Bfb + crit.

And 20 mobs? How many dungeons go up to 20? Brayflops hm? most you ever get is maybe 12 in the new dungeons. Regardless your AOE output is still a fraction of what brd or blm is dishing out, single target the highest threat mob to your tank after your CDs are burned to free up your whm to AOE. Throw some stuns, it'll take 4 or 5 RoTs to equal one Holy. In the amount of time you pull of 5 RoTs whm would be at 3 holy spells, I'm just don't see it.