My most success by far has been with flex, but I do have a title and another F4 with triangle (never made it past the Sweet Sixteen with FB). Honestly, I set the distro the same for triangle as I would for flex. I put it about where the relative qualities of my scorers demands, and I adjust based on performance.
The difference is that I don't obsess over PER/PASS in triangle quite like I do in flex. In one of my triangle teams right now, my starting five guys are currently accounting for 29%, 13%, 10%, 9%, and 6% of my offense. With my other one, it's 24%, 14%, 11%, 9%, and 3%. Both of them have really been more of the "one star, three guys who can chip in, a couple more off the bench," rather than "three stars and a bunch of nothing." But that's just how it's turned out in recruiting. Both of my triangle teams right now just happen to have seniors who returned after leading the team in scoring their junior year, so it makes sense that the distro is skewed that way. But I'd do that in other offenses too if I had a player like that.