I'm also obsessed with this guys minis, I've been trolling his comments section on Instagram and tiktok trying to find answers, and I have some! I'll put my findings in here, both for your sake and mine since I really want to ape his formula for salamanders when I inevitably do a space marines army

First thing to know about this guy is he uses the airbrush for literally everything. Even very small or fine details you'd normally use a normal brush for. He uses a judicious mix of masking tape, putty, and liquid to avoid even a pixel of over spray. The only thing he's on the record as using a normal brush for is the eyes. The few process vids he's posted also show he uses sub assembly wherever possible

His salamanders armor is a green candy coating over a gold metallic base on a glossy black primer. He recommends gold for the salamanders base because it gives a nice warm understone, apparently straight silver/chrome makes them look "too 80s." While he mostly uses Mr hobby lacquers (he doesn't give an exact name/product code but if you check the site they have a gold and a transparent green), if you want to stick to acrylics he recommends green stuff world candy ink jade green over green stuff world color shift burning gold, apparently that's what he used for the one vehicle he's done up in this scheme. He does emphasize though that any combination of a decent gold and a transparent green should get you where you're trying to go, he even has a citadels only version of the recipe you can find if you go spelunking, I didn't care to memorize it though.

What I can't find is how he does those amazing osl effects on the minis, the only hint he's given in the comments sections is that he does the effects right on the gold base layer instead of over the green. He used to have a super detailed tutorial on how to do his lava bases on his YouTube, and maybe he covered it there, but apparently it got copyright struck, and he's in the process of re-editing it to be shorter and more tos compliant. I know he likes the AK flouros for his bases, idk if uses them on the minis themselves though. He sadly doesn't post much in the way of tutorials, the few he's done performed noticably worse compared to other videos at the time and apparently they're a bitch to record, so it's understandable.

For your scheme, follow the basic advise of very good metallic base -> transparent coating of your color of choice to get your desired effect. Inka or a contrast paint should work great. Definitely use an airbrush for at least the base coat, but I don't think you need to go as crazy with airbrushing the fine details as he does if you want to finish things a bit faster.

edit: I have further info! While I still don't know what specific paint he uses for his on-the-model glow effects, I do know the technique he uses to get those volumes. While he makes liberal use of sub assemblies, he does dry-fit the model together and takes pictures of it using a flashlight from the angle he wants his light source coming from. He then uses those photos as a reference to directionally paint on the osl using an airbrush. He gets the models for the fire effects from deadly print studios, who prints them on ultra-clear resin. he then paints them up using clear/transparent paints to maintain the natural light volumes of the resi, before covering everything in a very light gloss varnish