Furious or Sundering Axe for W/Mo - which complements skills best?

This may be the wrong forum for this - it's not exactly a build or strategy discussion though...if there's another thread on this, just post a link and I'll close this down.

I'm torn between these two as the final upgrade to my axe. I generally utilize almost-entirely damage-based adrenaline axe mastery skills on this W/Mo.

Vampiric is very nice, but in the end I think it becomes more of a pain as you switch back and forth.

The appeal for furious is obvious, because most axe skills are adrenaline based. Yet, these skills recharge rather quickly (especially with cyclone axe or flurry equipped), so I'm not sure of the benefit of a 1 in every 10 hit jump in adrenaline.

Sundering is nice because it increases your damage 1 out of every 10 hits, but 10%, although rough, will result in only 2-5 extra damage in that hit. That equates to less than a half point per hit when weighted-averaged.

I really don't see any other haft that thrills me - zealous (meh) and the element-based attacks...

HELP!

Use zealous/vampiric/elementals.

sundering and furious = rely on luck