Here's some links you might find useful :)

• Terra Battle Wiki
• Terra Battle subReddit
• Terra Battle Forum (sign up, you won't regret it ;-) )
• Terra Battle Stats, a very useful Web-App to track your progress
• [Wiki] List of the currently known issues and how to solve them
• [TBF] Terra Battle "synthetic" Changelog
• [Wiki] Terra Battle detailed Changelog
• [Wiki] List of ways to acquire Energy
• [Wiki] List of all the best areas to grind your units
• [Wiki] Skill Boost Farming tips
• [Wiki] Daily Bonus
• [Wiki] Metal Zone
• [Wiki] Treasure Hunter Ability
• [Wiki] Negotiator Ability
• [Wiki] List of all the Adventurers available
• [Wiki] List of all the Monsters available
• [Wiki] Recently edited entries on the Wiki
• [Wiki] Recently added pages on the Wiki
• [Wiki] List of all (most of) the unreleased content
• [TBF] TB Compendium thread on TBF (with changelogs 'n stuff)