Sustaining multiple times

[Ravingdork]

If my abjurer casts his protective ward focus spell, can he sustain it twice in the same round to expand its radius of 15 feet? Can he then sustain it three times in the following round to get the maximum radius of 30 feet?

[ofMars]

There was some clarification from a developer that only being able to sustain a spell once per turn is going to be in the next errata/faq, think it was in a thread about flaming sphere. I personally don't think it would be busted to allow for that spell, though. Not sure when the errata/faq is coming

[Aratorin]

https://paizo.com/threads/rzs42q8p?Can-Flaming-Sphere-be-used-more-than-onc e-per#28

Mark Seifter wrote:

We have it coming in the next errata batch. Sustain a given spell once per round only, unless the spell specifically encourages you to do so more than once like spiritual weapon.

The thing is, that post doesn't actually clarify anything. I'd say rapidly increasing the Radius is an "encouraging" reason to sustain it multiple times.

[graystone]

Aratorin wrote:

https://paizo.com/threads/rzs42q8p?Can-Flaming-Sphere-be-used-more-than-onc e-per#28

Mark Seifter wrote:

We have it coming in the next errata batch. Sustain a given spell once per round only, unless the spell specifically encourages you to do so more than once like spiritual weapon.

The thing is, that post doesn't actually clarify anything. I'd say rapidly increasing the Radius is an "encouraging" reason to sustain it multiple times.

Even in the original thread, it seems "encouraging" to move the sphere multiple times to hit more creatures as much as Spiritual Weapon is "encouraging" you to "move the weapon to a new target within range (if needed) and Strike with it." IMO, it should have explicit wording for multiple sustains if it'd really meant to be a 1/round default much like feats say "Special You can select this feat multiple times."