Have a TB Monk and a Summoner w/ Monk + Huntress guardians ontop of the Golem.
Heroes that you are levelling go in front of the big crystal on the island at Hint 3, 0 speed stat, non-hover heroes that can't make the jump; should instead lodge themselves between the chain and crystal at Hint 4.
The towers on Hint 1 should be on the row of crystals while the Golem and Pylon on Hint 2 are on the ground.