You can, but that makes the deck worse.
The most basic adjustments you need to do after 'sticking it in' is throwing out Otyughs, FFQ and Fallen Druid (unless you plan to mutate scarabs) and adding Time Towers.
I've also found that such a build works best with 6 hourglasses and 2 or 3 Eternities, thus Flying Eternities replacing any Pulverizers or Eagle Eyes from the SG's rainbow.
Other adjustments just include minor tweaks like removing the graveyard, replacing rain of fire with plague, some shield adjustments, butterfly effect for permanent control, but it's still a rainbow mainly similar to SG's rainbow.
That is, the main stalling cards are similar, the quanta usage is similar except the increased
![Time :time](https://elementscommunity.org/forum/Smileys/solosmileys/../../../images/Misc/time18x18.png)
production, only the creature setup is changed drastically, but that's obvious when you replace three creatures with one.
Anyway, I've tried a number of different approaches to FG farming, including mono, duo and trio decks, but still the rainbow approach with Pharaohs is the most effective, so obviously it's not as game-breaking as RoL/Hope