[Taqwus]

FWIW, isn't there an option somewhere specifying which ships will break formation?

Another data point -- sometimes I design 'Planetary Bomber' ships, often with no anti-ship weapons at all (just lots o' napalm -- for use when the defenders are all dead) and assign them a 'Bomb Planet' strategy whose main differences from OFR are the movement strategies (Don't Get Hurt/OFR) and targeting precedence (planets first). In strategic mode, even when the PBs are in a fleet, the PBs do appear to break away from the fleet and stay back until all enemy ships/WPs/etc have been destroyed.

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-- The thing that goes bump in the night