How does Aghs phoenix worked?

Example:

Faceless Void uses Chronosphere
Phoenix ***** out Fire Spirits

Supernova with void cooldown reset
Double chronos and spirits?

And would this work with Refresher Orb?

OP?

it specificly said in the patch notes that Supernova DOESNT reset ultimates.

Nope, if you read the description of Aghanim's Scepter bought on Phoenix, it states that "ultimate abilities are not reset", but it does reset ALL other skills (such as Maledict that have 40 seconds cooldown), and replenishing both HP and MP. Well, if you consider the cost of Aghanim's Scepter, I'd say it's not really that good, especially if it's used on your allies and enemy got double kill because of that, but the stats are still pretty good on him.

Using it would be situational. Like after a big team fight where both sides took some losses and the survivors are pretty wrecked. Aghs Supernova could be theoretically used to get your team back up to full health and mana to do a push or grab Roshan quickly before the enemy team could recover.

But like I said; it would be situational.

I'd say it would be a really good pickup if you have naga on your team. If the fight doesn't look good you can ulti, grab an ally with low life, naga sleeps, and then you can return the ally to battle with full hp and mana.

Phoenix Naga Siren Terrorblade combo for double Metamorphosis is real.

I really think this might work but this would take a lot of timing:

You and (let's say Magnus) tried baiting with that Agh'd Supernova

Magnus blinks in while you dive
He fakes an ult in front of the whole enemy team where " Phoenix 'interrupted' him by using Supernova on him"
As your enemies try to destroy you and Magnus (they shouldn't be able to resist killing two strong heroes that are currently vulnerable) your team comes from behind and stuns/disarms them.
Supernova ends, Reverse Polarity, Carry kills, then done. You can all push/Rosh after that.