1) Summon 2x voidwalkers and 2x succubus
2) Target mob with Main
3) Target 2 other mobs with succubus guys
4) Sic succy's on alternate mobs
5) Then immediately sic ALL pets on main mob
6) Watch succy's seduce alternate mobs and keep them seduced if they break it.
7) ???
8) Profit!

http://files.filefront.com/AutoSeduc.../fileinfo.html

Lemme know if you want more details on the setup.