Great question. I went back and forth on this. In my mind, to be the most authentic you should bypass the speaker sim feature on the Captor and just let the impulse response "see" the rough and ragged amp tone and do with it what speakers normally do. But here's the thing, I couldn't really track with it that way. It didn't sound too inspiring to be sure.
So I did an A, B test - one recording it as mentioned above ... and then I did one using the speaker sim feature. On the later experiment it sounded so much better and felt a bit more like an actual amp when tracking. But the real kicker was that both of the test tracks seemed to come out about the same way after the IR was factored in. Weird? I don't know ... maybe that's what an IR does, is correct all of that.
This track on here was done the later way ... using the speaker sim to track, but then correcting it after the fact with the IR loaded into this great, free plugin called NadIR which is a Convolution Reverb plugin that runs on exceptionally low CPU. They have a 64-Bit version:
https://www.kvraudio.com/...t/nadir-by-ignite-amps But to be fair, most of you with more powerful systems than mine should be able to run all of this live and input monitor everything. In that scenario I would most likely go with recording method number 1.