Two Ships
Earthling – The weapon thread made me think of a good way of representing this ship in SCO. The “point defense missile” submunition is an anti-fighter weapon that can do light damage to ships. The Earth ship already has point defense, and is supposed to be a lower point ship among the stock lineup of ships. This combination of weapons makes it very obviously a “carrier escort variant”... as if it was specifically designed to defend the mothership! The is an SCO version of the US Navy's Ticonderoga-class AEGIS cruiser. The long range missile is too powerful for this low point ship, and the submunition missiles of the MW missile can easily be balanced to be as powerful, or as weak, as you want them to be in a lot of different ways in addition to just changing the damage that they do. You can also make the “swarm” of missiles more or less accurate/effective in a lot of different ways. So this ship would never be a problem again, and be a thematically perfect match with the Earth mothership... as if it were designed to escort it and defend it from missiles, mines, & fighters.
Scyrve – Then you could give the Scyrve the “long range missile”, but turn it into whatever “alien lore technology” you want that makes it a “seeking energy weapon” that does not weaken with range. In other words, functionally identical to the long range missile with different FX and lore. Some type of “Orb of Energy”, a slow moving “wave of energy”, it can be anything you imagine that fits it's function.