Vegging and blooming plants react different to high temps I've noticed. Vegging plants can take a beating, flowering is much more delicate.
I've asked that same question, no one gave me answer, so I've tested myself. So far I've substituted koolbloom for bloom in half doses, in my dwc mothers, no problems at all 2 weeks into it. KB is basically double dose bloom, slightly different but basically the same. So I'd imagine doubling bloom would be the same deal. So it would be 1-1-2 for first 1-2 weeks then kick the double dose in and change formula to 1-1-3. Then late bloom 0-1-3.5 or 3.25. Slightly tweaked from what king John told me. He does 1-1-2-.5 all the way through. But I don't see a use for grow in last 2 weeks.
Since I've chopped my micro use in almost half, I've seen no issues with the plants. Only things getting better.
I dunno liquid kb is expensive but I've had the same bottle for 6 months and I'm not even 1/4 into the bottle. Longest lasting investment yet. Almost out of bloom so I'm going to try substituting for last feeding Sunday. 0-1-0-1.5 lol translates to 5ml micro and 7.5 ml kill bloom. Lol I hope that math is correct.