I now did tests for my guardian and my minstrel as well.
guardian:
pre-imbued LI in the top row
In blue line it´s mostly good choices (perhaps even more useful on the weapon then mine as I still have might on it from times when might wasn´t useless). On the belt I only disagree with one legacy (Stoic Bubble Strenght instead of Warrior´s Heart Healing). The red weapon has some odd choices with two crit rating legacies which, but is otherwise ok. The red belt has one legacy I would definetly not choose (Guardian´s Ward Parry Rating), but is otherwise ok, too.
minstrel:

pre-imbued LI in the top row
I only compared blue line LI as I am not really familiar with red line.
The pre-imbued weapon uses exactly the same legacies as I use and on the songbook it´s only one legacy that is different: Healing Skills Power Cost instead of Anthem of Composure (Tactical Mits).
Minstrel and guardian are mostly ok in the choice of legacies, but as above mentioned, for champions there are some big flaws.