[Radek]

1. Non-native spell casters can learn spells at the minimum of the class level and the skill level / 2. A level 11 paladin with Vinecraft 7 and Spiritcraft 7 can learn up to level 3 vine spells and level 7 spirit spells.

2. Sorcery does not figure in it. You cannot learn non-native level 7 spells because you would need the corresponding ...craft skill at 14, which you can't reach unless you become a zenmaster. The maximum skill level is 12 (for non-zenmasters) so that you can learn level 6 non-native spells at most. If you become a zenmaster then all magic schools become your native magic schools so that the Enlightement trait isn't needed for getting level 7 spells in any magic school.