In my opinion, Dervishes are much better than warriors. While warriors can go scythe, that fixes their elite.
Dervishes who want to take just spec into Earth Prayers, put on enchantments like [[Mystic Regeneration (PvE)] and [[Vital Boon], then spec into Mysticism and put on [[Avatar of Balthazar] (which would give 110 armor instead of 80 armor

) and [[Mystic Vigor]. Energy shouldn't be a problem as long as you let enchantments go down before renewing. [[Faithful Intervention] is also a good back-up healing.
If you want to tank, slap on 3 attack skills (I use [[Zealous Sweep], [[Radiant Scythe], and [[Victorious Sweep]), slap on Avatar of Balthazar, some health enchantments, and a healing spell. Add on Windwalker insignias for even more armor while you have enchantments up, and you got regeneration, high health, and about 125 armor if you meantain 3 enchantments and Avatar of Balthazar.
A healing spell isn't needed and for PvE you can slap on [[Eternal Aura].
However, if you want high damage, go Assassin. Warrior, imo, is a bad profession (only my opinion though) but do find it's uses.