Seeing as 2 and 3 have been answered enough, I'll just give you my opinion on 1.
As of right now I am using ForteX, but I am really itching to go back to using DoTimers. While ForteX is very customizable,a good amount of the customization is just more colors on my screen so I do not use them. The main reason I am still using ForteX is because it shows when your DoTs and channels are actually ticking, very helpful for execute Drain Soul phase.