Took me forever to come up with a route on this one. I found a few skips but none seemed to be viable.

First is you can get around the flame wall blocking path to the switch which raises platforms to blue key. Unfortunately the other flamewall next to it is a big shortcut to the yellow key door so I think it's worth just lowering the flame walls.

Second you can make a jump to the TP that the second flame wall is blocking, but it's very precise and I'm not sure it would save any time because you have to wait for a big elevator. You jump from where the soul launcher is.

Last and most interesting is you can definitely grab blue key early. Once you raise platforms, the pillar with steelshot on it can be used to just make the jump across using a rocket jump. It feels very close to be able to make it just strafing too.

Kind of an annoying level since so many of your jumps can be blocked by enemies.