all mers are good for xp as opposed to WHAT?
some mercs are better for exp than others: e.g. phantom is very poor for xp, even if you know how to play him[/quote]
Phantom gets a lot of XP when you kill with melee due to the badges. With the gun he sure earns less[/quote]
most of xp from badges is for multikills. A single ace is 300 for triple, 400 for quad, and 500 for ace. Add one more kill and you get another 300 or so for a killing spree.
Badges for melee kills are very poor: one badge for first kill, than more for 5/10/20 kills.
Phantom sucks at xp cause he doesnt have any team support ability, and his killing potential mostly boils down to winning 1on1s, rather than scoring multiple aces