As much as a "gun" based tank would be for this game anytime I think about it I just fuse PLD with MCH in my mind, Bacily (shield & handgum) with no turret's or Gauss stance (thou it could be its "DPS" stance respecivly) & that its "tank stance" added an "energy blade" to the gun (would be the same skill in eather stance just diff animation per stance with diff abilities)
Idea of 2 classes fused came from the fact that I saw a clearly CNJ Y'stola use the dome move of AST... just like o.O wait you used what, I mean sure you're trained in magic by ppl of the country who made AST but you're using a CNJ weapon... damn it why can't I do that with 2 classes (hence PLD/MCH fusion was born in my mind, this help little in giving sujestion on you're idea OP srry)
AS for sujestions on OP's class idea maybe Magitek Barrior bit's when in "Tank stance" to block arrgo'd mobs? like mini-protect's that float around avi but snap to attack side if hit (min 4, 1 per side) would allow use of semi-flashy gun animation without it being smacked about like a ragdoll
