Hello,
I recently came back from an extended hiatus and have started to mess around with builds, casters and shadow weave.
I am saddened to say, that the drawbacks from Shadow Weave Magic are just too severe for any build to realistically build around.
I do not mind the -6 DC to transmutation and evocation spells, but the -6 CL to these spells is just too much.
Casting an extended haste spell at -6 CL as a shadow weave user, at level 10, results in 48 seconds of haste. Instead of 2 minutes.
If I cast haste as a 6th level shadow weave user, it results in 6 seconds of haste. Haste is imperative on this server and effectively losing 1 minute and 12 seconds (extended) per cast at CL 27, is not worth it.
-6 DC on Evocation and Transmutation spells is more than enough to balance shadow weave.