If jamming is high, FTL drives are small but expensive, and ranges are long then expect fighters.
Well that mostly wrong because:
1) There is no point in jamming in space due to being no stealth in space.
2) A FTL drive will be huge and require huge amount of power and a fighter will not be able to house the fusion reactors needed.
3) A fighter will never have a range more than the local gravity well unless you use a highly compacted fuel source, oxygen tanks, food and water are also needed for a long flight and it is easier to store such items in a huge battleship than a 100 ton fighter.