Creating status effect that scales on the number of allies with a specified condition

[Cmushi]

I am trying to implement an ability similar to Brilliant Tactician (grant status effect to self if all allies have specified condition) but with a scalable status effect that scales on the number of allies with a specified condition instead.

I usually try to find a similar ability that already exists ingame and tweak it but I cannot find any except for Brilliant Tactician being the closest.  I might be wrong but Brilliant Tactician seems to only trigger on if all or none condition and cannot be tweaked to for each condition.

If I have to create the ability from scratch:

• Create an ability aura that affects allies with a specified condition
• This aura grants them another ability aura that affects the original user which grants them the scalable status effect 

The problem that I notice is that aura can only grant status effects and not abilities and I am unsure if there is way to create ability granting auras.