Valgavoth's Lair - With your deck only being in two colors and with no add value for the land being an enchantment (the extra card type becomes more of a risk than reward), I would cut this land
Youre ramping very quickly, and youre ramping with lands, so its resistant to sweepers and means you can flip Nissa, Vastwood Seer well ahead of time (turn one Elvish Mystic, turn two Nissas Pilgrimage, turn three Nissas Expedition, turn four Nissa, flip is an example of the fastest way to do it)
The only drawback to Brightstone Ritual is that you need to be running a decent amount of goblins in your deck to get decent mileage out of it, and it's best used in a goblin tribal build
Grand Larceny It wouldn't be an Outlaws set if there wasn't some thieving going on, and Gonti, Canny Acquisitor is ready for the heist
Discord is not legal in sanctioned formats, and casual Commander use should be cleared with your playgroup first