Keep in mind that siren´s call can easily nullify your partner
Yes, but not necessarily.
Bloodthirsty is one of the Traits that can let you work around Siren's Call.
They both call for mandatory actions, so if you get a damaged living creature in your Reaper's zone or in the zone who's on your way to the Siren you can still pretty much do what you intended to do anyway.
so a mindless alternate pal could be considered
Yes, I've been looking for a Psychic Immune Demon, but I think there aren't any.
Correct me if wrong, please.
Also, don´t you like sectarus? It seems like a good action advantage
Yes, I like Sectarus but that would require a totally different build imo
I would need to add a significant amount of "pro active" Curses like Magebane and Ghoul Rot and at least one back-up Sectarus.
The curses I have in the book are more reactive curses, like Theft of Life in case the enemy mage starts regenerating, Rust if he puts on an armor, Poisoned Blood when you expect he'll start healing.
The most important curse, Rise Again is something I would obviously not put on Sectarus.
If you kill the creature, you can't cast Rise Again anymore and if you don't kill the creature Rise Again is left hanging there and can be Seeking Dispelled.
Imo Rise Again really needs to be played out of hand as a QC right before you finish off a creature as you want to take as little as possible risk of losing it.
Reply to Biblo's post coming later. Running a little late here