Hi
I'm not a Maestro, I'm an archer. Yes of course you will always need Adena. Regarding your armor, your exalted armour should suffice until at least 110. There are so many other things besides armour you will need.
You will need Jewels, Artifacts, Agathions, Talismans.
You will benefit from Homuculos, Tomes, collections, relics but those will come later.
If you're not in a Clan you absolutely should join one, make sure you're comfortable in it and a good one will have daily or constant XP parties. Parties provide damage dealers to gain XP and support people to help with boosts and protection.
Try doing the "Instances" daily as well, obviously the ones that suit your level, that will get you XP.
When you outgrow your exalted weapon and armour then it's another story, you'll need scrolls to enchant and stones to augmemt.
Hope I helped.