Your chance of being hit will go do down by 4% (50% vs. 46%) if your opponent has 100 combat skill, when comparing 100 magery with mage weapon, to 110. This is before counting things like DCI into the mix. If you have max DCI, the change is from 35% to 31% (or 1 less hit per 10 attacks). Anything that reduces your chance to be hit is good, especially if there are other bonuses and no real down side.
It will be worth it not only from the defensive angle, but also from your increased chance to cast your 8th circle spells.
Thanks bud, the vs the other Skill was what I had forgotten. Considering that is most like a Greater Dragon with Wrestling of what 145ish I dont think I win that battle but as you say, it will be an improvement and any chance at mitigagting that GD attack is a good thing. So I will take that road.
On a side not, if you have the time, when the heck did they nerf magery ---- as follows.
When I left, if you were a GM Mage you had excellent chances of casting that 8th level spell.
Last night after dieing to a GD that was more twitchy than me, it took my GM Magery character on the other account 25 casts of Resurrection to not get a Fiz. I accept my memory may be fuzzy but I am fairly certain that before I left Fizing more than a couple times at GM (The entire point of being a GM ... well and some enhancments) was being able to reliably cast those 8TH level spells.
it appears that as some form of punishment to Mage Skills, they spread the Ability to Reliably cast the spells based on a 120 Magery Skill Spread vs the original 100 Magery Skill Spread.