Any tips to play mixed casters effectively?

[Apatheist]

The ability to do that is long gone.

Bummer. There's no way to achieve the same functionality using nulls or an item at the end of the sequence to "pause" it, etc?

Might just have to manually manage DoT's otherwise. Or use use multiple instances of !shoot?

#showtooltip
/castsequence reset=3/target Curse of Agony, Corruption, !Shoot, !Shoot, !Shoot, !Shoot, !Shoot, !Shoot, !Shoot, !Shoot, !Shoot, !Shoot, !Shoot, !Shoot

Should work well enough for grinding low levels.