For the fellow DRKs out there..

[Cabalabob]

Personally I think delerium should be changed to 10% magic damage reduction (rather than INT reduction) and rage of halone should be changed to 10% physical damage reduction, while storm's path should be 5% damage reduction (both types). Dragon kick and virus should stay INT and STR down so they stack with these.

10% STR/INT down isn't the same as 10% damage reduction making it less powerful than a straight damage reduction, which makes both effects worse than storm's path even before the fact that they only reduce one type of damage. And for PLD, STR down means it has no effect on ranged damage or ninja's even though they're still physical damage. These changes would normalise the tank damage debuffs to make more sense for their style and with eachother as well as allowing both dragon kick and delerium to work together.

As for a dark arts effect, nah, to me delerium is the combo we use when we don't have the mp for dark arts or when we want to use dark arts for a buff like dark dance or dark mind without stopping our damage so we don't consume it. I love dark arts and would love to see more use out of it on more moves, but delerium isn't one of them.