Here's how to get the greatest equipment in the entire game - you will need...

a strong team (least 70+)

Patience

Treasure maps

here's what you do.

go to a grotto, beat the boss. repeat. eventually, they will drop their mega-drop. these are items with only a 2% drop[ rate - but if you work hard you'll get them eventually - i currently have all but one. (greygnarl will drop a legend treasure map, not a piece of equipment)

drops = equinox- Vesta gauntlets, nemean- invincible trousers, shogum- apprentice's gloves, trauminator- hero's boots, (forgot this pnes name but it's a dreadmaster rip) - sensible sandals, sir sanguinius- brain drainer, atlas- tropotoga, fowleye- spring breeze hat, hammibal- blessed helm, excalipurr- victorious armor, tyrannosaurus wrecks- angel robe.

but wait, there's more - if you can get your hands on some orbs - dropped by legend maps (e.g baramos, murdaw, dhoulmagus, estark , dragonlord etc.) you can combine these orbs with above items and an agate of evolution to make ultra-awesome items. there's a bit more but i'll let you find the rest on your own