This build is all on the top floor. 2 characters are needed (TB and double monk guard summoner), but it goes faster with more summoners.
Hint 1 has a huge spam of Owl Nests. Just upgrade the buff beam.
Hint 2 is where you place a double monk guard Summoner, doube huntress guard Summoner, and your builder Guardian. That spot is on the square where the forge is at. The most important thing is to have the auras buffed.
Hint 3 is where your TB is at, which is aiming mostly east. Your boosting should be able to reach the Hint 1 stack.