But Persuasion, UMD, and Religion are all absurd as well and Trickery might be best in game. Why do people get so fixated on blowing all their Feats on crits? Using auto-confirm to hit stuff they couldn’t touch otherwise?
People tend to gravitate towards to Perception 2 for a number of reasons.
First it is feat based so if you want to use it at all you have to pick it as early as possible.
Second it's not just a buff to party members, it changes the entire party's dynamic.
Third, and this is key, Trickster builds are often backloaded and Perception 2 at least starts kicking into gear as soon as Mythic Rank 4.
UMD2, Religion 2, World 2 all have their niche uses but considering the amount of time you spend in the lower Mythics you really want your MR4 power to feel decisive, which means something like Perception 2 or Mobility 2.
Athletics and Arcana have their appeal, but they can round out builds well enough with their Rank 1s and Athletics 2 is a more timely pick at MR6 for most who rely on it.
Persuasion 2 runs on ranks so its not really an option, even on Core.
Trickery 2 is the best dispel in the game. It's also arguably the only dispel in the game since Aivu's nerf. Dispel being so lopsided in Wrath means a lot of people just don't think about it. However, those who do might have some trouble working a melee range only Dispel into their characters.
Stealth 2 is surprisingly useful. Almost every enemy has True Sight, it's true. But True Sight has a range of, I think, 30 yd. As long as you can cast/attack from farther away than that you're golden.
Persuasion 3, UMD3 and Athletics 3 and other 3s would have their place in the spotlight if they weren't also Greater Tricks, meaning they are only available at MR7 and might as well not exist beyond DLC stuff. But in my opinion it's also a very common pitfall where people will say 'I'm going to make a caster fighter but I don't need BAB because of Athletics 3 and I don't need spellbook because of UMD3' in a game where the second Greater Trick is a meme that is only available before the last fight in the game.
Perception 2 also synergizes with Legend. Only Devils get to keep former mythic powers like that.
Finally Trickster is in a unique situation in how it interfaces with martial and spellcasting characters. To the martials Trickster's powers almost feel like a 'pure martial' build with little or no magic involved, which doubles itself as a prelude to Legend. To the spellcasters Trickster goes out of its way to not support them very well and Perception 2 is the only trick that synergizes with their class features.