Ask a Warrior Thread.

Another few questions:

When Aran AFA procs, does it hit only one monster? What's the range of AFA's (invisible) attack?

For the Aran's damage dispersal penalty to be removed, does it require level 1 Cleaving Blows?

If it's anything like the other classes' Final Attack, it will work for the monsters you hit. I don't believe Final Attack has a range, as long as you hit a target.

Aran's damage dispersal is removed entirely, even if you don't put a point on Cleaving Blows. The updated skill will give you 20% extra damage to bosses.