Thread:Evac156/@comment-24042891-20140930193516/@comment-24145588-20140930200659

The Unity Tree spreads happiness around. Literally. :-) Normally, to increase a monster's happiness, it needs to be near the decoration or monster that it likes, which can lead to some really tricky puzzles regarding layout -- it's really tough to get everybody close to their favorites. The Unity Tree eliminates that problem, because it removes the distance factor from happiness. Doesn't matter if your monster is right next to the decoration it likes, or all the way across the island.

I played the Ethereals differently from most people, so my advice probably wouldn't apply to you. I didn't try hatching any Ethereals until my natural islands were all populated and mostly leveled up. So, I didn't need Ethereals for coins on the Natural islands; as soon as I hatched each one, I fed it to level 15 and teleported it to Ethereal Island. From what you've described, though, you'd probably be better off keeping the Ghazt on Plant Island for a while, because (a) it'll earn big coins while it's there, (b) feeding it up to level 15 is quite expensive, and (c) once you move it to Ethereal Island, it just earns Shards, which are pretty much useless.

I won't try to advise on what you "should" breed on any of your islands. I'd just say play it however you like. I wasn't very strategic in what monsters I placed on my islands, with respect to their earning. I just liked breding a variety and arranging them in patterns I liked. You'll eventually reach the point where your monsters are earning more than you could possibly spend anyway. Last time I calculated, mine were netting about 18,000 coins per minute. Doesn't take long to get there.