The more I think about it, the more I think pushing for Elemental flagging alone for Vex level (and even lower) guilds is a mistake, and that it is a slow route to guild progression versus other options onhand.
Smith Rondo, the only raid level flag mob before Kod'Taz, is most definitely beatable by any guild that could kill, say, Terris Thule in ponb. I think any vex level guild could take him. Vxed, the second flag, isn't much more difficult than an LDoN hard, and with basically a 6 hour time limit, any level 65 group taking it slowly and conservatively can beat it. Tipt needs a solid construction, but honestly, as long as tanks use nohit disciplines (fortitude, weaponshield, nimble, etc) on the boss, gear really doesn't matter all that much on it. And that would flag a guild for Kod'Taz.
2 groups of vex level characters could easily farm that first Temple skulls event for Time phase 4-ish level drops. One group of vex characters could kill xp nameds all day for phase 1/2 level drops. And a very well constructed single group of vex characters can (and has) get through the 3 single group ikkinz raids, collecting a solid array of Time level drops, and more importantly, flagging the guild for Ikkinz raids.
Ikkinz raids were upgraded, but they are still not hard. I know a Vex level guild on another server, not flagged for elemental, that clears Righteousness, Glorification, and Transcendence. Those are all phase 5 to quarm level drops. I mean, the guild would still have weak slots after, but you'd still be getting 18 or so really high end items per sweep of them, supplemented by Summoner Ring, Yxtta nameds, xp nameds, and kod'taz pit/skull events. Then it's just Uqua and Antechamber, and while both are hard, there's an awful lot of cheesy workarounds possible in both to scrape by with minimal gear... which just leaves qvic, and that place reminds me of PoFire before the minis were buffed up.
Elementals and Time are good ways to gear up, but there is also intense competition for them, whereas for most servers there simply isn't for GoD. I think my server has the most Kod'Taz flagged guilds at 3, versus like 15 some elemental flagged guilds, and half the time mobs in Kod'Taz/Yxtta are just sitting up compared to elemental where everything is permadead.
The interesting part is Kod'Taz and Yxtta were designed for elemental, NOT Time guilds, so nearly all guilds currently in those 2 zones don't have a whole lot of motivation to farm the statics for drops that are beneath their level. Any elemental level guild that could make it there would probably be dominant, and from what I've seen, though difficult it is certainly viable.