I personally use the absorb magica glyph, Lord knows since they keep increasing resource costs getting all the resources back I can is a good thing. The increase in cp gains is great but I don't have many to put into cost decrease and increase regeneration yet.
Increase weapon damage does the same increase for the staves base attack. Probably not seen as fair to give even more spell dmg out. People using swords and axes have to get close up. Me I fight from a comfortable 28m away. 174 extra spell damage won't help you too much anyway. Not to mention you can already equip 2 swords for extra spell power, more than you should in logical terms anyway adding sp glyphs to those would make you way op. Imagine having 2 swords, nirnhoned with spell damage enchantments and make them torugs pact. Spell damage for the 2 item set. The traits and glyphs. It'd be nearly 800 damage plus just on your weapons alone. Nice idea but easy to see why they don't exist.
PC Master Race
1001CP
8 Flawless Toons, all Classes.
Master Angler
Dro-M'artha Destroyer (at last)
Tamriel Hero
Grand Overlord
Every Skyshard
Down With BOP!