I think your only option is to create castsequence macros that have actual spells in them. I dont have an DK's but an example would be something like this (one line for each toon)...

Code:
/castsequence Hammer of Justice, Cleanse, Cleanse
/castsequence Cleanse, Hammer of Justice, Cleanse
/castsequence Cleanse, Cleanse, Hammer of Justice