How do tank mitigations stack?

[Xiaoki]

Hey, so I'm curious how the tank mitigations interact with one another. Generally speaking we have Rampart at 20%, Reprisal, a 10% damage debuff to put on enemies and then a 30% reduction skill. We then have our 25 sec CD job ability. (Sheltron/TBN ect)

How do these stack, and is it worth it to stack them?

If I use Rampart and then Sentinel, what's the upper most reduction I'm getting out of that? It definitely doesn't feel like a 50% reduction.

What are the diminishing returns for each interaction? And do the self buffs work differently from Reprisal in regards to total incoming damage and reduction?

Ps. Use small numbers. Lol. Explain it to me as if I were a child. >_>.

The effects are separate.

So, if you use Rampart and Sentinel together they reduce damage taken separately.

If you were to take 100 damage then Rampart would reduce it by 20% to 80 damage, then Sentinel would reduce that 80 damage by 30% for a total damage of 56.