What level do I need to obtain balloon cloth on the new servers?
The level depends of your skil las player and lucky. Because you need run the minos in Oramond. I think you can do with level 60 or less in team.
What is the best tactic to obtain Balloon Cloth? (on new servers and merged servers)
On new servers, just go to the place than faster as you can (Get the level or team).
On merged servers, put a character in the palce and enter in the game inmediatly after the merge.