Earth Ward Mega-Potion

Has anyone ever tried using these either NQ/HQ to see how it affects the damage for the Titan fight? I feel that there is something missing especially within Alchemy to make use of these resist potions that nobody really seems to be doing. I am just wondering will probably do my own testing later in a pug to see how much it absorbs damage from Titan, especially potential astral flow damage.

Is there any posts out there relating to damage reduction from resistance? Maybe you can absorb the damage of Astral Flow if you fail to kill the heart (though the point of the fight is to kill the heart). There must be some justification for these items, also given that their on the same global cooldown as ethers/potions.