Dirty_Player
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You can remove: Speedy, Terraformer, Marauder, Leprechaun, Merchant, Sniper, and redistribute their skills; it won't be excessive.
Terraformer - pathfinding
Marauder - economy (you can even remove the old property)
Leprechaun - luck
Merchant - diplomacy
Governor - leadership
Healer - first aid
Sniper and Explorer - remove them completely
Eagle Eye - like in WoG.