A single attack with Voja can buff your whole board and refill your hand exactly what you want from the best Elf commanders in MTG when youre trying to close fast
Part 1 of the best bulk cards from Tarkir: Dragonstorm
You can definitely make more aggressive blue decks
However, in recent sets, various commanders have been introduced that can either produce treasure or interact with it in some capacity, leading to an increase in decks that are specifically focused around the creation and utilization of Treasure
Noctis Lucis Caelum You dont need to be rainbow for Kenrith, the Returned King to be good, as even just being WU makes this a great mana sink
Also, if you didn't go first, you can also just wait to play your land for turn until after attacking with Cartographer's Hawk