SAMURAI SHOWDOWN

[Shippuu]

In the event a boss became immune to magic damage you simply wouldn't enhance your weapon with magic. It really is that simple.

So then what's the point of having the ability at all? Does having magic "on" do more damage? Then why would you want that tank for that content if they underperform compared to other tanks? Why would you want the other tanks if that take overperforms for every other content cause "magic on" does more damage comparitively? Will having a BRD make that tank stronger than the others? Once again this broaches numerable new balancing issues thus making the job that much harder to implement.

Things are not that simple. It's an MMO, things are never that simple.

DRK has reprisal which like shield swipe is essentially a counter attack.
Before Swine if borrowed from is a magic counter and only would be seen in heavy magic damage raids. Kinda like how Dark Mind is mostly unused unless you know an attack is purely magical.

A tank with a magical version of shelltron would be something new to add, especially if that ability provided a strong counter-attack on top of reducing the damage of the magical attack. Shelltron is a widely used skill, and magic variant would be equally used. I don't know if I can think of any boss that doesn't use at least some form of magical attack at some point.

Sword spirit is debuff and ensures a crit(sounds a bit like a combo of SE/DE + Life Surge), Curtain would simply be an attack combined with a stoneskin/divine veil effect.

Having a SE/DE+Life Surge type ability would new for tanks for the most part, although dark arts acts similarly by augmenting various attacks. There's still plenty of other skills and abilities that Samurai have had that give their attacks magical damage or elemental properties.

Curtain would still be a new type of move by providing a tank skill that can apply a defensive barrier on itself to mitigate incoming damage. One of the most requested things is a tank that shields itself via barriers.