Mikaela, the Spirit of the Candle

So a little while ago, I made this champion concept. I can't find my flash drive right now or I'd post the whole thing, but I want to ask, with the new stealth mechanics, what should I do with her stealth? Invisibility or Camouflage?

Allow me to explain a bit further: her passive gives her a unique resource, Light, which she starts with 100 of. She loses Light per second while in combat and all of her spells cost Light. If she runs out of Light, she enters stealth and becomes unable to cast or basic attack. This lasts until she gets more Light by returning to base. Her Q is a low cooldown, low damage ability that gives her back a net gain of Light if it hits something (which makes her not need to back every 100 seconds to refresh her light if she does it right). Her W instantly puts her into stealth, consuming half of her current stacks of Light. After a few seconds, she reappears, dealing a burst of damage to enemies in an AoE around her.

So, Invisibility or Camouflage? I'm personally leaning towards Camouflage.