That's it! And I know what you mean, I am sort of a "Mad Chemist" with all my lotions and leather care products.
In general, I use Leather CPR for most of my leather bags and rehabs, I find that it is a good general purpose conditioner that works well in many situations, including the
Coach glove-tanned leather bags.
I also keep Lexol Cleaner Wipes and Lexol Conditioner Wipes on hand and I use them for quick touch ups and sometimes before putting a bag into storage at the end of the season - or if I am unsure how to clean and condition a delicate bag. They are very light products and not the best for deep conditioning but they are okay in some situations, and they are unlikely to do much harm to a delicate or unusual bag.
I use Blackrock's Leather n Rich as the final application (after Leather CPR) on most of my glove-tanned leather rehabs, it really brightens and restores color and it hides a lot of scratches and flaws. You have to apply it very sparingly, rub it in quickly and buff. If you put it on too heavy it gets sticky. It has an odor but it fades soon.
The Leather Therapy & Restorer is good when I want something "in between" a light conditioner like Lexol and a thicker creamy conditioner like Leather CPR. The Italian Coach bags have pebbled caviar leather and they have a finish that prevents much absorption by a conditioner. I don't use thick conditioners because I don't want to have any white, gunky stuff drying in the "little valleys" between the "raised bumps". It also give the bags a nice shine and hides some scratches and flaws.
I also use Leather Therapy Restorer & Conditioner when I've given a bath to a glove-tanned leather bag and it is drying out very quickly - or parts of it are drying out quickly. It slows down the drying process and helps to prevent stiffness, cracking, and curling.
I often use Leather CPR and sometimes Blackrocks on glove-tanned pebbled leather bags even though the leather has bumps and valleys - but I put them on sparingly, rub in quickly, and wipe away the excess. You can always to another application later, after there has been some time for the product to be absorbed into the leather.
I've successfully used DYO Reptile Conditioner on genuine snakeskin and lizard bags.
Yep! I'm the Mad Chemist!