Been doing some testing with the cube rune vs base effects, and they are very underwhelming. I can confirm that the cube rune is working as intended, but the problem im highlighting is the base effects of the illu spells. Here are examples to show what im talking about:
Balance :
- stopwatch timed at 27 seconds duration (20s spell + 8s effect on last pulse)
- casting without rune did 44 damage and restored 32 mp over a duration of 27 seconds
- this equates to 1.63 damage per second
- casting with rune did 72 damage and restored 51 mp over a duration of 27 seconds
- this equates to 2.67 damage per second
- mp cost is 55, so every cast is at a loss of mana even with legendary rune
Conclusion - review of damage / mp regen numbers, suggest to increase mp regen with legendary rune to either break even or push above its cast cost - 27 seconds is a long time to stand still to recover the mana spent on the skill. Aoe hunting groups of monsters will die in half the time or less, so it feels very under utilized.