DDO really needs to come out with a stacking manual for everything.

That being said,
1) Do the Sorcerer manipulation enhancements stack with potency items?
2) Do the Sorcerer lineage enhancements stack with lore items?
3) Does the spell penetration enhancement stack with the spell pen feat and spell pen items?
4) No clue where spell focus falls into all this stacking?

I have a general understanding of stacking, but this is my first Sorc and there is a lot of different things that say they do or don't stack with other things.

Help!