I've recently think that it is time to upgrade my old double set with the new Deus units, since I only change unit set very rarely (I think only twice in my whole 4 years of PSO2) I though I have to make it future proof this time again.

I set my sights on:
Apprentice Soul/Anga Soul/Astral Soul
Modulator/Vinculum
Doom Break (thank god they are cheap now)
Ether Factor
Ability III/Mutation II
Elegant Stamina/Offense Boost.

What confuses me is how to include a Soul with Ether Factor knowing Ether factor eats 5 slots on its own already (ether soul + 4 ether catalyst) so that leaves it with one unit affix slot while transfering soul requires 3, or 2 with soul receptor.

Does that mean I have to do the ether catalyst with Soul on it as a fodder?

A little help please, it's the reason I only did it twice as it confuses the hell out of me.

Lets just focus on the affixing and not the cost, I have enough meseta to cover for that.

Thanks.