Putting the Xenagos trigger on the stack and then casting Berserk (or Fatal Frenzy) seems like itll pile up damage pretty quickly
Vesperlark can see play in any deck filled with 1-power creatures, such as any deck with Ranger-Captain of Eos packages (Mother of Runes, Weathered Wayfarer), etc
This applies to all types of cards, except energy cards
Blink cards like Ghostly Flicker and Thassa, Deep Dwelling help generate that advantage by giving you those repeated enters without having to cast more creatures
Osgir, the Reconstructor is still the best commander for this style, but it fits in nicely with reds sacrifice cards to fill up your graveyard with artifacts and pluck them back
Compare to Magic Standard decks for mastering the meta