there definitely are a lot of trusts with a weak combination of WS/abilities/stats and AI that they don't get any use and this is how we should retort if they come around the corner with the "there are already too many trust spells, we can't add any more" arguement.
i'd like to see for example a RDM (i know we already have plenty of those) that casts bio III instead of dia III. or a trust with light based dispel maybe trusts with pets to increase head count to counter mechanics like odins Geirrothr. pretty basic stuff that should already be covered but isn't, i'm sure you guys can come up with more examples.
Still waiting for our BLU trust, Raubahn!
Areuhat and Maximilian have a little bit of BLU vibes in their design and they are just as useless as BLU currently is, does that count?
outside of monberaux and ygnas (bad effort/reward ratio) i kinda enjoyed collecting new trusts, had a bit of "got to catch them all" feel to it, ofc would be nicer if they'd be usefull, too.