Plus the Blood Spirits waned and waxed throughout the 3060s until their death in 3085. They gained an entire Galaxy from the Ravens I think, plus some more construction plants here and there, and their two hidden colony worlds had at least Protomech construction facilities based on Wars of Reaving and Suppplemental. Like I posted earlier, second line designs and older Omnis like the Spirit Walker (aka the Omni Black Knight), that Omni Crab thing from Clan Fire Mandrill, and weapon refits of Star Leauge stuff from their caches easily make up for a lower more modern production base. They also trade with a couple of more of the powerful Clans during the Wars and get some boosts that way.
What might not be a bad idea is to put together a What If refit list over in the Fan Desgins era for Blood Spirit retools and field refits for older stuff lying around. We're also told in the fluff for the Blood Kite that designs developed by the Spirit scientists were often resource intensive, so they may have gone for quality just like they did warriors in their training before the cost effectiveness idea came along.