With two mages make one focus on 2 branches, second on 3. Dont limit yourself for elements only, One point of witchcraft could offer brutal buff - Oath, Handy cc -Blind, Gamechanger - Absorb elements. Absorb is from second level, but used at proper moment is worth of AP penalty.
Make sure you give both of them at leas one point from each branch.
All spells scales up with the caster level, so even "weak" 1st lvl spell is always powerfull enough.
Use look at :
http://divinity.wikia.com/wiki/Witchcraft_%28Divinity:_Original_Sin%29
Get notice, the 1 point to the skill allows you cast spells of 4 levels.
2 points for up to 8 level spell.
and so on.
Its confusing for the first, but has some meaning.
Also get notice:
first level needs 1 skill point gives you 3 spell slots
second level needs 2 skill point gives 2 spell slots only
5th level and 5 skill points gives you 2 spell slots and quicker access to 1 useles spells << --- genraly do not recomend invest 5 skill points, but Aero exception ---> for the Awesome Immune to Stun Talent.
Also consider to give your Warrior Geomancy 1 skill point.
Even Int-5 he can cast at 100% success and full spell power!!! these 3 amazing spells:
Summon Spider
Oil
Earth shield
Last edited by gGeo; 06/04/15 05:03 PM.