We want to put counters on all our creatures, even the small 1/1 tokens, so we wont be triggering his ability too often
In the past with just Kuldotha Rebirth it usually wasnt worthwhile since your odds of drawing a Kuldotha Rebirth wasnt especially high and cards like Ornithopter and Memnite are pretty bad if they aren't turning into three 1/1 Goblin tokens, but now the odds are in favor of having one in hand every game
The Dark Rituals synergize nicely with the artifact core of my collection, so I felt like this was the way to go
Dont believe me
Mirari's Wake is also great because it isn't just a mana ramp card, it also gives all your creatures a minor buff, making it great for Selesnya token decks
Of course, it's highly unlikely that I'll have even a half dozen of these various triggers all out at the same time, and if I do I may very well lose my mind