Most mojito recipes were missing something, and I think that's the level of lime I like for that kick. With a bit of sweetener it's smoothed over a tad.

Koolada can improve mojito, but it's very subjective from one person to another so I suggest you start low, and gradually add some over the course of a few days until you find that sweet spot. I myself avoid Koolada because I still find it tastes like medicine despite having zero menthol.