Changing 2nd profession: W/E => W/Mo

Currently im using fiery/earth W/E.
Im using ele skills as support so conjures, armor of earth, immolation after sever+gash and similar are in place.

Im considering switching to W/Mo though, couse of PvP mainly. After change Id like to visit every town/mission skill seller and fast unlock/buy needed monk skills.

Here is the question - I have ~20 skill points @ hand. Which monk skills would be neccessery and profitable for pvp warrior.
ATM im tired of constant conditions and spells that harm me in battles. As W/E i can deliver some punch, but i cant last in combat.
Also mana pool of W is also limited and spells work short (apart maybe from conjure and armor of earth).

I want to be able to debuff myself while treatened by spells like empathy and conditions and of course maintain reliable dmg dealer.

Any advice from expierenced W/Mo is appreciated. Thx.