No, you said you can simply go buy gear until you get good rolls. That's false. You have to buy other items, break them down, then hope you get what you're looking for from an engram, then infuse it.
On top of that, you're almost ever (if at all) getting God rolls from the treasure armors anyway.
I don't think you realize how much money it would actually take to do what you're saying. Seriously, no one is doing that.
You don't have to spend money though. The Rise of Iton book has free LL3 armor you can take out infuse and dismantle ad infinitum until you get what you want. I've used it to get T12 4-4-4 builds on my Warlock, decked out with the fire ornaments (which I haven't paid for either, just opened all the free boxes weekly), with Solar Arc *and* Void armor on my chest (rolled until I got 98%+ chests in all 3 elements).
The catch is many of the perks on that free armor are fixed (arms are always HC reload, which is what I use anyways, chest is always Shotgun ammo, boots are always rocket). So you could theoretically pay your way into an alternative build that better suits your style buying boxes with unfixed perks.
The catch here is, after a certain amount of tries the material requirements become non-trivial. You *will* run out of glimmer and armor materials and Marks before your cash money hoard is infused and tested for quality. So even when you pay to bypass the grind...you still gotta grind.
Basically farming boxes is the worst way to get a T12 build if all you really want is the perks. You do this if you want good perks and want your outfit to match that specific set you're buying. Otherwise farming something like Heroic Strikes where you get plenty of engram drops, glimmer, mats, Rep for rank ups and all that is a far more efficient way to do it.
Or you can, you know, just buy stuff from the IB vendor - all Efrideet armor rolls are T12. And rotating stock (Iron Lord artifacts, subclass quest and speaker class items, Xur roll son occasion like this weekend's Glasshouse, Shiro's class items occasionally), as well as some fixed stock vendor rolls for armor can be T12.
Even with guns the whole "I need a god roll to compete" thing is iffy. There's usually been avenues for non-RNG great guns. We all want that Rifled+Rangefinder Luna but honestly the vendor Palindrome is 99% as good. When Sidearms became comp it took like 5 minutes to realize FWC sells a near perfect one. Vendor Hawksaw was competitive, and when Clever Dragon ruled the day it dropped like actual candy from IB. Some stuff is tricker because of no perfect vendor equivalent like a good Matador (Last Ditch is worse), but then again there's no P2W path to get around that.
My monthly "what's going on in the OP?" rant will end by summarizing: there's 0 ways to get a meaningful gameplay advantage in destiny through Microtransactions. If you want to pay to win, join a Sherpa's Patreon or something because nothing else will work.
i thought it was 4 or 5 cycles at the start when people were underlevelled? And then dropped to 2 cycles once the sword bearer was at level?