It goes like this

My main and only toon has a ton of stacks of past lives.
Including 3 sorc and 3 wiz.

Now I want to roll an Arti life for fun and to put the ton of runearms I gathered during all those lives to good use.

My question is: Will those 3 passive sorc PL and an active wiz PL add +4 to runearm DC?
I know that Spell Focus gear won't work on RA, but have anyone tested if the PL will?

Seems like a silly question, since SF/GSF/ESF Evo work...
But we never know... because sorc active PL work as Mental Toughness, but won't qualify as a pre-req in it's place. Same for Active wiz PL not working when Spell focus is pre-req.