If You Were A Class/Job Designer...

[JackFross]

Ah thank you for the clarification on just how much foresight actually does. Also I completely forgot it was cross class >_< So a bit off topic is foresight before ter saved for tanks busters or used to reduce overall damage?

Depends on the fight. In Sephirot EX, for instance, there's a large amount of physical tank busters in phase 1, so it's best saved for one of those when Rampart+Sentinel (Shadowskin+Shadow Wall) are both on cooldown.

In the final phase, the towers are physical, so it works the same as tank busters in p1. Very effective for mitigating that damage.

It's useful for dungeon pulls, since most mobs are physical.

Situational, just like every other mitigation cooldown.