Why do undead need the Rogue personality?

This is my first time playing in a LONG time, and by no means was I pro before.

What should an undead/rogue attacker be doing, and why is the rogue personality better than Tactician or something similar?

Thank you in advance, I'll be watching this thread.

p.s.
Also, for a newly OOP Undead/Tactician attacker. What should my strat look like? Im planning on ~30 DPA. I just started protection, so I am not sure exactly what it will be at.