well vas sb can move but its slow, so the best thing to do is just turn around the well, keep outside of his fire, and take air superiority, once you have it, get bombers in the well and start bombing the sb
if the player isnt so stupid he will put the sb into a repair stations area, and then you can start bombing the planet
once the planet down, take it and make your own repair bays, take his repair bays down and have fun bombing the sb down
an other solution would be a kodiak hoshiko on the sb with a fightr cover, it can work with a repair bay support
a destra guardian progen and halcyon works too but you'll need at least 2 progenitors
you can also as vas make an egg with lvl 3 nano and nano the sb down while skipping shields, use kanraks to help out too and bombers
or at last the best solution for me would be to build your own sb to face it.