In all honesty, I was just giving the products a try all at once. MOSTLY because I was my dogs maybe 2-4x a year. I don't bathe them that much unless they do something that gets them really dirty.
However, next time I do it, I'd probably do the shampoo, conditioner, and maybe the thick n thicker for Koji. He's already blindingly white.
I've never had a groomer do my dogs in anyway. I have had the daycare give Koji a bath, but that's because it's $20 and they'll clip his nails too.

I don't trust anyone (your posts are exactly why, lol). And I've been clipping Miko's hair since he was a pup. Hey, back then, all I had was Sheltie Talk to go by, so his ears were always clipped too much, especially since they're prick. He gets hacked sometimes, but just like my ugly bangs, they'll grow back.
ETA: I usually don't bathe them at night because I don't typically blow dry my dogs. I may give them a blow dry to get some of the wet out, but usually, I let them air dry (their undercoats take forever anyways). Koji especially, since I forgot he hates the blow dryer (I can't recall the last time I actually bathed him myself).
p.s. are you saying my dogs aren't show dogs?