Let's talk "shouts"
The main gripes most guards have with shouts are the following
1: Save yourselves absorbs conditions from nearby allies before rune of the trooper or pure of voice effect conditions.
2: Save yourselves doesn’t give the guardian any resistance which can lead to it being a suicide button.
3: Hold the line & Retreat cool downs are kinda hefty given what they do. Having them reduced to 30 second base cool downs would be nice.
Like your idea of having pure of voice and altruistic healing combined. Could finally make the valor line not an absolute must for PvP.
I generally don’t use “save yourselves”, because the CD even with it normalization. In the past it was used with RF to counter the conditions at the expensive price of long cool downs x 2.
The Pure of Voice nerf should definitely be reversed. After its nerf they have slowly buffed conditions severely; made vulnerability strengthen condi damage (why doesn’t protection reduce it?), made condition spam way easier for all classes, made burns stack, made poison stack, made confusion and torment braindead and damage you even if you stand still.
All this ever without buffing Guardian vitality or undoing nerfs to condition removal or buffing condition removal skills, oh sorry they reduced cooldown on CoP and buffed Smite Condition now, that should do the trick