As I mentioned I like to think it could be a debuff caster what about something like this:

Condensed Libra Gauge – Looks like the Blue Spellbook (but blank) and has six empty slots in a circle and one in the middle. Keeps track of what aether charges you have accumulated.

Water cannon - level 1 – 250 potency - deals water damage to a single target and applies Umbral Attenuation for 7 seconds. Grants a charge of water aether. Transitions to Feculant Flood on hit.
Feculant Flood – level 30 – 280 potency - deals earth damage to all enemies in a line and applies 1 stack of Umbral Attenuation to damaged foes for 7 seconds. Grants a charge of earth aether. Transitions to Blaze on hit. Cannot be put on hot bar.
Blaze – level 50 – 310 potency – deals ice damage to target and 50% damage to nearby enemies. Grants a charge of ice aether. Applies one stack of Umbra Attenuation to first target hit for 7 seconds. Cannot be put on hot bar.

Umbral Attenuation – increases water, ice and earth damage taken by 1% per stack. Foes can only have a maximum of 3 stacks.

Reflux – level 5 – 250 potency – deals lightning damage to a single target and applies a stack of Astral Attenuation for 7 seconds. Grants a charge of lightning aether. Transitions to Alpine draft on hit.
Alpine Draft – level 30 – 280 potency - deals wind damage to all enemies in a line and applies 1 stack of Umbral Attenuation to damaged foes for 7 seconds. Grants a charge of Wind aether. Transitions to Fire Angon on hit. Cannot be put on hot bar.
Fire Angon – level 50 – 310 potency – deals fire damage to target and 50% damage to nearby enemies. Grants a charge of fire aether. Applies one stack of Umbra Attenuation to first target hit for 7 seconds. Cannot be put on hot bar.

Astral Attenuation – increases lightning, wind and fire damage taken by 1% per stack. Foes can only have a maximum of 3 stacks.

Abyssal Transfixion – level 10 – potency 250 – deals physical damage to a single target and applies a stack of Physical Attenuation on hit for 7 seconds. Transitions to Drill Cannon on hit.
Drill Cannon – level 30 – 280 potency - deals physical damage to all enemies in a line and applies 1 stack of physical Attenuation to damaged foes for 7 seconds. Transitions to Flying Frenzy on hit. Cannot be put on hot bar.
Flying Frenzy – level 50 – 310 potency – Leaps to the target dealing physical damage to target and 50% damage to nearby enemies. Coverts aether charges into stacks of condensed aether. Applies one stack of Physical Attenuation to first target hit for 7 seconds. Cannot be put on hot bar.

Physical Attenuation – increases Physical damage taken by 1% per stack. Foes can only have a maximum of 3 stacks.

Matra Magic – Level 50 – potency 100 – Consumes Condensed aether to deal unaspected damage to a single target up to the number of Condensed aether stacks.

This was fun and I felt like sharing. ^^