So, new month, and I made diamond 2 the first day with this list. Essentially, very basic idea: your 1 and 2 drops buff up everything else in the deck, and everything else in the deck has immediate impact because it's either a weapon, relic weapon, has charge, or at the least, is Valk enforcer. Get the ball rolling early, attack from multiple angles (aegis, charge, relic weapons) to get some resilience to removal.
Not sure about mix of vanquish, vanquisher's blade, and finest hour mix (3, 2, 0), so feel free to play around with it.
Market cards: bore for popping multiple permafrosts or maybe an obelisk if necessary. Warhelm for giving your merchant charge. Sword of Icaria for more pressure if you're "stuck" on 3-4 (the deck basically wants to top out at 3-4). Plate and obliterate in case the game goes long, and both of those cards are fairly medium, but RIP old 5FFF Drake. If you don't have a plate, feel free to replace it with something else--I find myself getting warhelm and sword of Icaria more than anything else.
Power base is standard aggro seats + banners + seals + add power, then replace some fire sigils with granite waystones because markets and the chip damage may be relevant at times.