Pretty sure Logia awakening is gonna gap everything
- Neither was Vegapunk able to replicate 1 (one) logia, we never also seen a logia awakening this far into the story
Whatever it is it probally shit on everything else conceptually.
For the rest anything that has no cap is basiacly better than what has a (presumed) cap, or rather an earlier cap, vs if it has a ressource cost.
So for example if there is no cap on armament haki it can be more defensive than Lunarian genes. However at the same time there seems to be little ressource cost, or in the seraphim case, non at all to have your flame burning, as opposed to Haki. Same is true for Awakenings we are told Awakenings are a toll on your staminia, especially if you are untrained.
Given that, outside of Logia awakening, the best are proball Mythological Zoan awakening, Conquereor, Armament, Observation and Germa Genes as all of those have an infinite potential cap, as stated in the story, and can either be trainied to have low resource course and in the last one not one at all, atleast not that is communicated so far.