Kanakattax said:
Do you guys think I should put the 800 towards the masteries? Or save it for energy or something else?
Opinions are divided on that one... well, if you plan to regularly buy gems so you don't need to be too careful about spending them, then definitely unlocking all masteries at once on your starter champion will help you a lot. But if you're f2p or planning to spend very little, it's more difficult to say. You get a lot of gems for free early on, but later not so much, other than the 10 per day for daily quests and occasionally from daily login rewards.
The top level masteries are must-haves for end-game content to maximize your damage and survivability against high level clan boss or dungeon bosses, increase/extend your most important buffs and debuffs and so on, but early on they don't necessarily make that much difference, and the starter level masteries are easily unlocked with a limited number of minotaur runs. If you spend 900 gems on 11 ancient shards instead and get lucky at the double summoning rates event, perhaps you'll get a few game-changing rares and epics that could help you much more. Then again, perhaps not, spending resources on shards is obviously a gamble.
Also, keep the gem mine in mind. You spend 500 gems but get them back over the next 100 days and after that it's free gems every day. Obviously a long-term investment, but if you're planning to keep playing this game for many months or years, certainly worth it.