Throw Glaive does benefit via the Haste allowing for additional casts, and FotI being delayed is a significant loss since it is absolutely the highest DPS-per-GCD regardless of if it benefits or not so delaying it is a major mistake, so I'd say you are wrong on both counts. Then again you seem to be focused on the opener, so it's agreed that using it (
specifically in a situation where you will not need it for AoE in the next CD cycle) early is ideal.
@
Mara403 Purely in the context of Metamorphosis/Throw Glaive (and not the opener):
You should be looking to cast it either A) being at 2 charges and capping due to MotG, or B) wasting the cooldown. Not using keeping TG rolling is a bad choice no matter what given how high the damage-per-GCD is, especially given that it now indirectly benefits from the Haste granted via Metamorphosis.
These are however very small and there are probably arguments for each (alongside gear profiles that will lean toward one or the other), but as far as I'm aware, wasting Throw Glaive uses even during Meta is a bad choice (since it's always assumed here we're using Bloodlet and Momentum).
- - - Updated - - -
Satyr and Distant Army fight with each other as the best enchant in sims regularly. There is a big problem with Satyr that it will deal damage, but not be registered to a player (which means it rarely will be tracked in logs and meters) so it is difficult to attribute, but its damage is powerful. Distant Army however doesn't suffer this so will
appear better, but from all I am aware of they are relatively equal and choice reigns right now.