My only gripe with the game is that healing doesn't give XP to the healing units. This means you need to place them in combat to level up instead of placing them behind the fighters like they are intended to be, and with them initially having low health they are very squishy. I know you can kinda cheese it by reducing a monster to 1-2 HP and then getting them to attack, but it feels like going against their role.
> I know you can kinda cheese it by reducing a monster to 1-2 HP and then getting them to attack, but it feels like going against their role.
This is a problem with the XP-per-kill system. Wesnoth could use a variant instead. I use the above strategy all the time to level the healers up.
Note that elven units have slow (their healers), which is very powerful in its own right for getting a kill on a unit. First slow, then deal damage with other units.