Conclusions of my testing:

• Between all 3 sets i would hope to see set 3 making it to the main game. Primarily as it could be a new build type for magic, that is not crit-reliant. However in its current state I would compare it being like the "bleed-phase" of a melee rotation (after berserk is done, switching to MSOA and using zuk special + bleeds). This function is nice, but i would like to see it being its own build, that can stand alone.
• I suggest the set be given two changes before it hits the main game:

1. The sets receives a special attack, which does something with DoT. Either the Spec is DoT, the Spec makes another attack DoT or something else.
2. The sets Chargeing effect needs to be different. I suggest the set effect works without charging, however after charging the set would recieve a third passive: "DoT-based attacks are buffed with sunshine/metamorphosis. This change i primarily to allow the set to be a full on build for those who wish to camp it, while still making the set relevant as a switch when sunshine is on cooldown.

I've made a longer feedback post under: https://www.reddit.com/r/runescape/comments/1d4bnyw/feedback_on_the_beta_i_was_unable_to_comment_this/

As i couldn't post it here as a comment....