Also Amitoi has specific buffs on specific islands, so try to use right Amitois on right places, Amitois have upper green arrow when u standing on land for more rewards.
dont push to hard for purple< they cost to much for traits...fully traitted blue an a couple of green best in slot...will be more powerful then full purple with no traits. i have 3 greens..1 purple and I have more combat power then uni and I'm a tank.