[X] Summer's Cheerful Laughter: C
[X]Common-Breath Zephyr
I'm choosing these two for a few reasons. First, I created Summer's Cheerful Laughter so I have a bias towards it. Secondly, this is the combination of the longest-lasting effects which I value for perception and translation effects. Third, specifically Summer's Cheerful Laughter, this seems to be the only perception tech that also affects social perception, which seems like it would be important if people also want to be dealing with other cultures and languages with the art up and running. Fourth, again specifically for Summer's Cheerful Laughter, is that the technique doesn't actually lose any benefits if there are is no stealthy entities around which seems to be a big focus on all the other perception techniques.