What class to play as a partner to the warrior

Hello hi. A friend mainly plays a warrior and we care about playing together, i.e. leveling, pvp, etc. I would like to play as useful for a warrior dps (something will beat something) support (dps, healing, buffs) which classes would be most appropriate, I will always be able to change trees as long as these classes they had some bufy and the possibility of healing not only from holy or there restoration - they recommended good chemistry for war to palki and priests?