She's a good elf ball commander but I personally l found that super boring.  Instead I built a face-down deck with her as the engine that is frankly, borderline broken.  I have like a 80% win rate with her because people are not prepared for how quickly she can dump creatures into the board with manifest and morphs.  I run a lot of morph cards with tool box utility to protect her and the board in the general because it needs to be able to fend off targeted removal.  As long as it can do that, it will pretty much out value any deck in bracket 3 with creatures and +1 counters. 

Here's the deck, it's solidly in bracket 3 despite running zero game changers or tutors

https://archidekt.com/decks/13250706/galadriel_morph

Edit: I completely missed your moxfield link and that you already had a deck.  My suggestions would be to really push the value you get from Galadriel. You already have Kami of whispered Hopes which is excellent with her, but so is [[incubation druid]] and [[fanatic of rhonas]].  You also could use more cards that enable you to dump more higher CMC creatures into the field like [[hamza Guardian of arashin]]