Dual wielding tulborn wand ideas wanted

Dual wield Tulborn wand

50% Chance to gain a power charge on killing a frozen enemy
20-25 mana gain on killing a frozen enemy
adds 10 -20 cold damage to spells per power Charge

Main skill 5link Freezing pulse, Spell echo, Cold penetration, Faster projectiles, Ice bite So I have 6 power, 4 Frenzy and 4 endurance charges. I use one first snow for area. Clear speed is very good (21k tooltip DPS with all charges. LVL 63)
Defense Mind over Matter, 4 endurance charges, freeze almost everything.
I gain endurance charges with the hierophant Conviction of power.
Divine guidance improves mana pool and adds extra mom. (don’t have that yet)

Damage wise I have a few options
Should I go for more spell crit?
Freeze duration and increased cold?
Vaal hasre with increased skill duration nodes?

Defensive wise.
I am now saving up for a Tabula, which I hope to upgrade eventually to a skin of the loyal
I can still go all three ways. (armor, evasion, energy shield)
Mom does not go wel with energy shield but hierophant gets 1/3 of mana as extra energy shield. I have lots of mana.

Any advise or comment is appreciated.