Iconus Guardian shield needs tech support

I had an assumption on how the shield works, but i think im wrong.

 

I was under the impression that the area of the ability is where the guardian needs to be for the units affected to get the reduction and does this AoE style. It is not how it works, at least to my testing.

Basically the purple aoe is the range of the ability, but the ability itself is a buff that lingers post leaving range. An issue im noticing is that a lot of times the Guardian doesnt apply the buff to all possible nearby units. Sometimes it happens because it runs our of shield, but ive noticed, at times, one guardian has 6 ships covered(by showing 0 on the ability) while another sits at 0 units affected, or less than 6, while still having half or full shield and is idling, even though there are enough ships to cover, meaning not more than enough guardians. So I think there needs to be some mechanical tweaking to make this unit better at applying its ability.

 

I think it makes sense to have it apply a shield to all nearby units at the same time and "refresh" that more often. Right now it feels like it operates as a hybrid single target/aoe buff, but it doenst behave very efficiently.