SP & MP | Wesnoth version >= 1.13.6
authors from add-ons which helped with their code: Ruvaak(AWW)
Everything can be configured.
Additional XP sources : Passive, Heal, Curing Poison.
Leaders can gain XP when other units gain XP at a certain rate and can decrease based on distance with a minimum rate.
XP Multiplier from sources : fight, kill.
/!\ Be aware than even with only x3 fight, kill XP gain units level up like crazy.
XP well included so that a gain of 13.5XP and 2.5XP amounts to 16XP and not 15XP.
- (Non Fixable) duplicate XP gain for 2+ healers on a unit missing HP for 1 heal
For coders see API.md
Changelog: see changelog file or the wesnoth forum topic.