...and back in the Holon Phantoms-on meta, it had a ton of different supporters to copy using Telepass - Roseanne's Research, Celio's Network, Steven's Advice...all of which are pretty gamebreaking. (I ran a slowed-down version of it right around when it first came out, and using Steven's Advice to draw 6 cards, plus play another Supporter, is pretty awesome.)
It also had the advantage of using Double Rainbow and Scramble Energies then, which accelerated its attack speed further.