http://reefer450dejeff.e.r.f.unblog.fr/files/2017/03/the-official-triton-method-beginners-guide.pdf
This 'beginners guide' recommends >10% display volume as refugeum, 10x tank volume flow through rate, no mechanical filtration aside from skimming, splashdown into ref, dosing to ref, then skimmer, then return... and, for some odd reason, a single wall, bottom flow divider between skimmer and return pump.
The only point I see as fairly inflexible would be the 10% minimum ref size and the lack of sock/mechanical filtration. Without 10% ref space, or pretty darned close to it, you just don't have the volume to contain the macro algae growth required. Socks or floss are going to seriously reduce particulate matter flowing through the refugeum. The other factors? IMHO, a bit less critical. 10x is real high flow through a ref, wouldn't bother me much to drop that to 8 or so. Dosing into another high flow area isn't going to have much of an affect. Under/over wall on the return section... I can't really figure out why they recommend that one. As long as you're not running mechanical filtration there, I can't see how an over/under bubble trap would have any effect. Same with a dedicated splashdown area... as long as you're not running it through a sock, I can't see what difference it'd make.
That said.. it's their method, and as someone who is considering using their method, it behooves you to try and comply with _all_ of their advice, even if you don't really understand it. I was planning a Trigger sump, but changed my mind, and built a sump from a 55g tank. That way, I could match their specifications. with a refugeum 18% or so of display volume.... even did their single under flow divider to the return pump. Ask me again next year, I might well have something different to say, but for now, I'm trying to stay as consistent with the documented method as I can.
Several companies have started offering, or at least talking about offering, Triton specific sumps. I expect it to be a common option in the near future. Of course, the 'fad' may well be gone in a year, and they'll quit offering them

Who knows.