Outofspace
Sogeking / Deeps
K. 20% increase in crit bonus gives you 5% more damage crit% of the time.
So if you have 10% crit like you say that one talent point gets you .5% more spell damage total. If you have 10% crit then 1% more crit gets you 1/110thns more damage/healing or .9% more damage and healing roughly (slightly lower because spell crits aren't at the full 200% in this case).
With 10% crit 1% more gives an additional:
melee dps .9%
healing .9%
spell dps .9%
With 10% crit 20% more spell crit bonus gives an additional:
melee dps 0
healing .5%
spell dps .5%
So if you have 10% crit like you say that one talent point gets you .5% more spell damage total. If you have 10% crit then 1% more crit gets you 1/110thns more damage/healing or .9% more damage and healing roughly (slightly lower because spell crits aren't at the full 200% in this case).
With 10% crit 1% more gives an additional:
melee dps .9%
healing .9%
spell dps .9%
With 10% crit 20% more spell crit bonus gives an additional:
melee dps 0
healing .5%
spell dps .5%