The reason I want to just look at Commander numbers and nothing else is simple: I dont think we will be playing in person (in North America) until next summer, when this is on the verge of rotating
Although Etched Champion was a card we picked up as a reprint in Modern Masters packs, its legacy in the game is actually through the Modern format, where it saw and continues to see play, in the Affinity archetype
The only big factor here is whether you have artifacts worth copying, but if you build your deck right that shouldnt be an issue
Wurmcoil Engine 5 Just a good heavy card
Witherbloom Pestilence (BG): Sacrifice creatures for value, gain life, and build unstoppable momentum with synergistic counters and effects
You could build an affordable amber army around Stitch, Rock Star using some low-cost amber cards, such as the one-ink Lilo, Making a Wish who gets you two lore every turn