I'd say Rapid Synthesis (or maybe Hasty Synthesis) fits it's description fine. The words "risky" and "reckless" don't have any implication of speed. Normally when someone does something in a hurry, recklessness is kind of implied anyways.

If anything, I'd say Careful Synthesis is more misleading than Bold Synthesis. When I think of doing something carefully, I imagine it to have the least rate of failure. And that is certainly not the case, from what I can tell.