@nynaevelan my first island basically just legends and heroics, all at least level 15, most are levels 20 and above with 3 or more elements to better utilize the crystals. abut half of them are at least 160 percent gold boost or higher, some actually having 320 percent. i have like 3 legend habitats on the first island, 1 maxed ad 2 at level 3. but like i said, once i stuffed an island with level 2 and above habitats, you can actually squeeze 10 level ones in there to take advantage of the real estate. i would love to stick 10 level one pure/legend/war in all of them, but not all dragons have them ad each additional copies doubles in cost...basically, each additional one of those habitats for me now cost something like 70-80 million each additional and will double after that, lol.
goal is to do 1.4 million food a day which cost 280 million gold a day....i guess technically i'm close to that if i click on the gold every single time it fills up, but im not quite insane tolog in every single minute 24/7, lol.
the level one metal/electric habitats are actually decent,though still low compared to the big 4. but you can squeeze in younger dragons in those and have it last afew hours before it fills up.
in heroic races,you actually don't need the habitats to fill up. i click on any habitats all the time with just barely any gold and it still gives items. so long as there's gold, it gives an item