Firefly Infinite - 10 turn Ultimate - Moc 0 cycle

Bronya E2 boost Firefly's speed by 20%, meaning we can go:
FF Bronya FF FF Bronya FF FF ~
This results in plenty additional turns and is ideal for 0/1 cycle setup.
In this MoC there's trotter buff so by breakdown, we have 4 turns in 1st wave (3+1bonus)
amd 6 turns in 2nd wave (5+1bonus).
The great thing is as long as we stack high speed on Bronya the advance forward shifts two Firefly subsequent turn along. Further test proves that even swapping Spd boots into Attack for Firefly still work with this strat and results in pretty significant damage increase (at least 10%).