Would you like an in-game parser?

[Tridus]

I've done everything you have listed except increase size of buff/debuffs and used Focus Target. Mainly because one I didn't know you can increase the individual size of HUD elements and two, what the heck is focus target? O.o

Focus target is an extra target box that is locked to a target and doesn't change when you change target. On PC, you can get it by targetting Susano and typing /focustarget

That gives you a target window for Susano that never changes, so you can ALWAYS see his casts and current health in it. You can position that separately from your normal target in the HUD configuration, so put it somewhere easy to see.