Savage Wombat
Hero
I really wonder how they got their numbers.
Maybe they thought: Hey, level 8 (dragon?) should be 4000xp. And someone said: oh that is way too much. Lets make it 3900xp, so we can add an extra hobgoblin minion, so that the dragn becomes realy dangerous with that martial advantage^^
Since they clearly would not have said something like "well, we don't want the progression to be regular or people will notice" - they must have carefully playtested the chart by adding and removing hobgoblins from a fight until they all agreed that the ogre was as effective as 4.5 hobs. Otherwise it would be silly.