?
I don't understand your point.
I normally use a Playstation-like control pad.
If I use an heal spell when I target (and lock) a monster, it appears a subtarget ( ) finder, I can select a party member with left and right and click X for ok.
I have tried with keyboard now, and you can select directly a party member clicking on it or his name, or you can use F1-F7 for a faster target.