Reverb, The Kid Who Split Reality

Role: Mage/Fighter

Melee Attacker; Gloves/Gauntlets as his weapons

Passive - Alternate Reality: With each basic spell you cast you gain a stack of Alternate reality. With each stack you gain 0.5/1/1.5/2% of damage reduction with a maximum of 10 stacks. This increases with each point put into your ult. If you die you lose all stacks of Alternate Reality.

Q - Reality Tear: Skill shot that deals initial 20/40/60/80/100+(50% AP) in magical damage to the first champion hit and an additional 10/20/30/40/50+(50% AP) in magical damage if they basic attack Reverb in the next 5 seconds. Cost: 40/45/50/55/60 mana Cooldown: 10/9/8/7/6 seconds

W - Crossroads: Activate to dash to target ally to grant them and you a spell shield that if either gets popped, both pop, and both you and target ally gain 10/15/20/25/30% movement speed for 1 second. Can cast on only yourself to dash a short distance and you gain double the movement speed if popped. Cost: 60 mana Cooldown: 12/12/10/10/8 seconds

E - Space Crack: After a slight delay target area burst's open into a crack in space. This crack deals 60/70/80/90/100+(60% AP) over 5 seconds and at the end of the effect it explodes stunning those within the center and slows those still in it for 0.5/1/1.5/2/2.5 seconds. This can apply two stacks of Alternate Reality, first upon cast and second if you successfully stun someone. Cost: 20/30/40/50/60 mana Cooldown: 15 seconds

R - Dimensional Split: After a brief channel blinks to target opponent dealing 100/200/300+(100% AP) in magical damage that deals an additional (5% AP) in magical damage for each stack of Alternate reality and Consumes all stacks (Max +50% ap). After arriving you become immune to disables for 3 seconds and if it kills the target you gain 2 stacks of alternate reality. Cost: 100 mana Cooldown: 120/100/80 seconds

This is just an idea, nothing is subject to finalization this is just a representation of what my idea is. All base and ratios for abilities are simply there as an idea. Offer what might be more balanced in terms of ratios and such but don't say "oh he's op like this" or "Oh he's too under powered" it's just a concept I don't intend to throw what he has now into game. I'm mainly looking for what the abilities do and how the kit looks. In terms of builds my intention is he can be built as a full mage or a bruiser. I'm not good at base hp/mana or what they gain per level but the intention is his abilities will be a bit costly and if your not careful mana will go fast as well as have a decent cooldown on each, again offer suggestion don't just say he's broken or underpowered. I basicaly came up with this and was inspired by Ekko, thought since there is a time breaking character why not a space one? Yes this means Reverb is from Zaun and knows Ekko as they have a friendly rivalry going on.