Recommendations from a website are not always the way to go… Just recently I’ve seen people complain about a flavor being used over 4% turning quite nasty, but when I look at the website where I buy my concentrates, there are recommendations for a use of between 10-20%.
A lot of it depends on your equipment and your taste buds. It is always better to start low and build your way up. Take a little bottle, fill it up with 10ml of your base, and add to your liking to find out what the best % is for you.
CAP Spearmint has a median average of 5% usage among ELR users. I would definitely not start any higher, rather lower.
Extreme Ice is from Flavor West if I’m not mistaken, not FA (FlavourArt). It is used at a median average of 5% as well.
Again, a lot of it depends on your equipment. If you use an RTA/RDA with a dual coil to vape, I’d start a bit lower. Are you using a pod or AIO system, you might consider upping those flavors but personally, I’d still start at those percentages and work your way up. More concentrate doesn’t mean more flavor. Often you’re going to mute your flavors if you’re using too much. It’s weird but less is often more.