yeah, if you want to use an axe, create a warrior.
if you absolutely need to use an axe on your dervish just because it looks oh so cool, then do it on your own time with heroes and hench because i would curse you out if we were in a pug.
Guess it would be something like Mels or Lyssa Avatar + whirlwind attack+ eternal aura+ holy fury+ dismember+ executioners+ other damage pve skills and/or rez.
Warriors have Strength to go with Axe Mastery. Dervishes do not. Warriors can run a Strength build using a Strength req shield and have Axe Mastery 16, Strength 12 or 13. Dervishes cannot do that.