Crystial, The Runaway Shaftmaker

My idea for a new AP Offtank, Crystial...context, its a "ghost-in-the-machine" type of manned excavation unit, minus any type of pilot

[Q] "Coal Cannon" - Crystial fires a mass of coal in a 800D line after a 0.75s delay, inflicting 60/110/160/210/260 (+60% AP) magic damage on up to 4 enemies along the path. If Crystial has over 50 Heat on cast, 50 Heat is consumed to apply a 1.25s Blind effect to all enemies struck. This becomes a 2s Blind effect with 100 Heat and consumes all Heat held. <Health> 30/45/60/75/90 <CD> 10

[W] "Steam Vent" - Crystial passively inflicts 2/3/4/5/6 (+0.3% Max HP) bonus physical damage on basic attacks, stacking once per 10 Heat held with a maximum of 20/30/40/50/60 (+3% Max HP) damage. If Crystial has over 50 Heat on cast, 50 Heat is consumed to heal it for 30/60/90/120/150 (+30% AP) over 5s. This heal is doubled with 100 Heat and consumes all Heat held. <CD> 25

[E] "Wrecking Ball" - Crystial launches a chained iron ball up to 575D after a 0.5s delay, inflicting 40/70/100/130/160 (+6/7.5/9/10.5/12% Max HP) physical damage on the first enemy struck and Slowing them by 30% for 2s. If Crystial has over 50 Heat on cast, 50 Heat is consumed to increase this Slow to 50% This becomes a 2s Stun with 100 Heat and consumes all Heat held. <Health> 40/50/60/70/80 <CD> 11

[R] "Cave-In Protection" - Crystial slams the ground hard in the target direction over 0.5s, creating a 375D wide wall that blocks all projectiles for 4s. Crystial also receives an HP shield worth 20% (+1% per 60 AP) of Max HP that lasts up to 5s. <CD> 150/140/130

Ability "Unstable Engine" - Crystial gains 5 Heat every 2s, plus an extra 5 Heat per basic attack, with a cap of 100. With every 25 Heat held, Crystial gains 2/3/4/5 (+2% AP) Armor and Magic Resist at the cost of 10 base Movement.