Is anyone has similar idea with mine? My idea is combining resonance with support skill heal. As you know at max level resonance will balance hp and mp. And max lvl heal will add 3000+20% max hp with 300mp cost. 300 mp is only 15% of 2k mp. Example: Your character have 20k max hp and 2k max mp. With resonance at 0 mp you will get 10k hp and 1k mp. Spend 300mp to heal. Then you get 17k hp and 700mp to spend. That means you will spend 15% hp to gain 35% mp. Combining this two skill will make you able to gain unlimited mp and spam skills more recklessly. In conclusion tank wont need ampr or mp charge anymore. Tank will also be able to dish more dmg for example buster blade (auto crit) or enchanted blade (element and unsheath). You don't need too much hp too because you can heal whenever you want. The disadvantage is you need to drop shield and many interrupt skills. Is this build viable? What do you think?