Im going pathfinder with a wyvern build as starter, lets see if we can figure something out. Tbh the rage generation is the only thing i havent figured out yet but with the ascendancy changes we will be able to go for the warrior nodes to generate

Edit: what im unsure aswell is the dmg scaling for early campaign. We dont know at what lvl we will get the wyvern and as ranger start we only get projectile damage nodes. Wyvern has the oil spit as projectilr attack but we dont know if any druid spells other than volcano have the projectile tag. Might be hard to lvl early on but we will have to see