I main white Mage and I'm not trying to boast but I'm pretty good at it. It's fairly easy to dps and heal once you know the content(raids or trials or whatever) that you are running. Asylum and tetra make it even easier since HW came out. Aside from all that OP, there will always be someone in a party that wants you to do something you aren't doing. Don't let those trolls discourage you.