Use amber crystal on your offhand. Proc not so much worth it due to internal CD. Also stealth usually not worth it in Wizard but if you add +5 All skills , you can get 10 hero points into stealth to last you a few extra seconds. If you're lucky, getting another 10 stealth from pet along with 2x +5 All skills for 20 stealth hero points. That stealth would last a far while in order to 100% dodge.
Although you need initially 50% dodge before you go into stealth for 100% dodge because 50%x2= 100%.
Permanent stealth is a bit costly but it's doable. Reduced CD at max or at 75% (75% with Epiphany) or using the Hunger Set to reduce CD and Increase APS for all skills by 37.5% when you have enough mana.
Before stealth used to be good for all classes also and I remember before it had nerfed so you needed 50% dodge on gear for 100% dodge stealth and that reason was to reduce stealth in arena.
Stealth proc is ok but it can overlap with your main stealth skill and you need high enough reduced CD to increase the proc chance. 10% may be ok though but you still need to attack alot to increase chances. Vanish is also 10% stealth and that mythic also gets affected by hero points with the effect on blinding enemies in close proximity.