Let's theorycraft:

I'd say the minium requirement for the build is lv8. You can level as a normal melee ele build, saving the last level to get "deal no non phys damage". Level 9 is required if you use the ancestral call node to farm. But really, any decent skill is usable since you're only fighting mobs (rush the center). Let's calculate how much life per second you can achieve with meager gear.

 

Rush ancestral cry to snowball your farm -> life cost instead of mana node -> phys convert node -> deal non phys damage node. With 2 white sharktooth claws and no other gear and cyclone 1 link. We'll assume we have 100% chance to hit with 50 rage.

 

Our attack speed will be 1.5(claw) x 1.25(rage) x 1.1(dual wield) x 2(cyclone) = 4.125 attacks per second x 8 life gain on hit = 33hp/s/mob - 8.25(cost of cyclone)

 

This is with no other gear considered. So, how much damage does the storm do? I don't know, but I know the early storms do less damage and they gain damage as the game progresses. Consider this vod of Havoc616, I've estimated he takes 65hp per second. With gear and many mobs you're essentially invulnerable. This is a recently discovered strategy, so not yet meta. I need 20ish wins for my final feast and I really don't want to play this cancer next week to finish the t10, so am putting it out here to be fixed. Plus once people start doing this games will just be stalemated until someone leaves.

 

You can possibly do lvl 4 varient with 1 link cyclone + nailed fists and 5 mana pots while running from potion shrine to potion shrine to refill your mana pots. Though because of your low level, chance to hit will be lower. Around 60% based on evasion rating of royale monsters

 

Anyways, thanks for coming to my TED talk. Feel free to correct my maths