From my understanding, the addon is to help with knowing what spells to use to maximize DPS, along with reminders for things like buffs/shards.

What I've found with the Warlock portion is that there is a lot of 'Wait' time after loading up DoTS even with Filler chosen and Use Wand chosen.

From my perspective, I think it would make more sense to not sit waiting while you can use a wand.

Is there a reason why wand does not show up to be used until the target is below 5-10%?

I will take a look, The "Wait" is just added at the very end of the code instead of it just blanking to the skull placeholder.