Syrcus Tower is 1 tank, 2 healer, 5 dps per party

[Nekodar]

Does anyone have any guesses about the whole gear/tome/oil/sand?

...
Again, no one knows at this point, but any educated guesses?

Based on various sources (translations from non-official sources) combined with the Q/A thread, UAT, oil and sand will eventually drop from Syrcus Tower at 30% drop rate.
And oil/sand will NOT be in there from 2.3, but will gradually be added over time... Chances are UAT will be there from start sharing loot lockout with the gear that drops in there.
That would allow people to get the Weathered weapons.
My guess is that oil will be next (for accessory upgrades) in 2.35 and sand in 2.38.

My guess is also that it will be an extra chest at the last boss that is shared over the full alliance.