HUD tips??
To be compatible from WAR to Caster / Melee?
Hrm... I think we are missing a few points here so I'm not sure what to say

If its tips you want I think This Thread talks about RDM. As for HUD, its mostly personal preference.
For example I like to keep my enemy bar and personal buffs on the lower side of the screen instead of the higher as to be able to see the AoEs under my own feet while paying attention to the buffs.