Outcast Spitegrove Assembly Question

Just picked up the Outcast Spitegrove. Can I make 2 of the 20 dryads champions so I can either have 2 units of 10 or 1 reinforced unit of 20? Also for the Spite Revenants, I already have 2 units of Tree Revenants, would making the 3 units in the spitegrove Spite revenants be alright as well to have some variety?