Blood Weapon and Delirium should only have one buff.

When you use Delirium, you get the Blood Weapon buff, and the Delirium buff.
You also get the MP back as two separate instances of 600 and 200 MP.

XIV already struggles with hitting the buff limit and causing effects to break as a result, and yet DRK has one button that gives you two buffs that do virtually the same thing.

So, my recommendation is simply that Delirium no longer gives the player the Blood Weapon buff, and Delirium's effect be changed to give you 800 MP, 10 Blood Gauge, and enable the usage of the Scarlet Delirium combo for the next 3 GCD's, as opposed to functioning as it presently does.

Additionally, while not super important, it is slightly annoying how much flying text appears on the screen when you use Scarlet Delirium's combo. It almost starts to obscure your player character with how much flying text tanks already have on top of receiving two buffs and two separate instances of MP restoration every time you use a GCD, and then the effect of losing two buffs as well.