Round 24~26 (frames 18177~19978): On R24 I optimized the times I'm holding Down and luck-manipulate so that the red bomb lands on the middle column before clearing the white diamond. Then near the end of R25, I press Up to directly drop the stack of cyan monsters. Finally I sync up the RNG state partway through R26. Net time save: 31 frames
Round 27 (frames 20611~21555): Rerouted the setup and optimized when I hold Down. Net time save: 114 frames
Round 36~37 (frames 30278~32409): Optimized movement and when I hold Down during the setup in R36, then some minor changes in pause durations in R37 to resync the RNG state. Net time save: 80 frames
Round 38 (frames 33315~34493): More setup movement optimizations. Net time save: 48 frames
Round 41 (frames 37861~38492): More optimizations to get more bomb falling speedup from holding Down. Net time save: 31 frames
Round 45~46 (frames 42826~44283): On Round 45, I press Up to drop the white bomb faster, which saves 9 frames, then Round 46 has more fairy manipulation optimization to save another 7 frames.
Total time save over V3: 320 frames