Skarner has had 4 gameplay kits so far. Which, so far, has been your favorite?

Just going to list what sets them apart. The wiki has a lot of errors in his old kits, so I have to go off memory for a lot of this.

Original Kit

• Passive reduces cooldowns on basic attacks
• Q has a slow
• W granted attack speed
• Attacking units marked with your E will consume the mark to heal Skarner

V 4.2 rework

• Passive reduces cooldowns on basic attacks
• Q grants a stacking attack speed buff instead of slowing
• W grants an increasing movement speed buff instead of attack speed
• E slows instead of applying the heal mark

V 4.10 rework

• Passive causes Q and E to apply "Venom" stacks. At 3 stacks, your next attack against that target deals magic damage and stuns.
• Q cooldown is reduced by basic attacks. Q stacks now additionally grant movement speed.
• Q and E damage gutted
• R consumes all venom stacks to deal bonus damage (up to 700 (+100% AP) total magic damage)

Juggernaut Rework (current)

• Passive is the spires (rip dominion)
• Q loses all steroids (moved to passive)
• W loses all base shield. Instead, has a health ratio.
• E applies venom, and your next basic attack stuns.
• R damage gutted, no more venom interaction. (Maximum potential damage went from 700 (+100% AP) to 200 (+120% AD) (+100% AP).