I can’t find a guide to this, so I have no idea what you need to take on a Blood Raider Gas Processing Site solo. Is a Harbinger with T2 pulse lasers enough? Someone said Core Runner Exile Distribution Base with a Burtix or Prophecy was doable, and this site for the Bloods should be able the same, so a combat battlecruiser should be sufficient?
There is some partial information on here: Combat sites - EVE University Wiki. Looks like you might need to adjust the fit if you don’t have a data analyser.
Good luck!