You know you can buy them in the troop arena stores?
I assume Camaro knows that. I bought them there for a while, until I had over 4k. I'm down to 2800 these days, but there's no rush anymore. They've made it clear that they're not allowing new Cap Ships to go instantly to 7* and they're going to restrict capstone abilities to 5*, 6*, and 7* promotions. I might have a little less than I need to max out Malevolence and finish maxing Finalizer and Raddus, I haven't done the math, but I'm pulling in enough that I don't think I'll drop below a level that allows me to instantly boost Finalizer and Malevolence when I gain the relevant stars.
...and Raddus can wait a bit. Raddus seems a fine ship on its own, but it doesn't have any good Resistance ships to fight under its leadership. PXW is only decent. Rey's Falcon is less than that, but not bad. The RPXW is just bad. Three ships and not one of them good? Resistance is the worst faction in the game that has its own capital ship.
So I fight the deadly level, I'll max out all my ships, and maybe someday if my stock is low enough I'll go back to farming Prestige in the Arena store. But right now, given where I'm at in the game, 2800 seems plenty good enough.