Infinity or Pride for zealer's merc?

[misterdumpling]

Infinity or Pride for zealer's Might Aura mercenary?

Polearms
(4 sockets)
Ber, Mal, Ber, Ist Infinity Required clvl: ?
50% Chance to Cast Slvl 20 Chain Lightning when You Kill An Enemy
Slvl 12 Conviction Aura when Equipped
+35% Faster Run/Walk
+255-325% Enhanced Damage
-55% to Enemy Lightning Resistance
40% Chance of Crushing Blow
Prevent Monster Heal
0.5-49.5 to Vitality (Clvl)
30% Better Chance of Getting Magic Items
Slvl 21 Cyclone Armor (30 Charges)

or

Polearms
(4 sockets)
Cham, Sur, Io, Lo Pride Required clvl: ?
25% Chance to Cast Slvl 17 Fire Wall when Struck
Slvl 18 Concentration Aura when Equipped
260-300% Bonus to Attack Rating
+1% Damage to Demons Per Clvl
Adds 50-280 Lightning Damage
20% Deadly Strike
Hit Blinds Target
Freezes Target +3
+10 to Vitality
Replenish Life +8
1.875-185.625% Extra Gold from Monsters (Clvl)