Part of it is learning from other players as well: Owen Turtenwald had Palace Siege in his sideboard, so maybe Ill try that. Being observant is a good way to notice other players ideas and try them for yourself
One of my best friends in the world is Simon Nielsen, former World Magic Cup winner and multiple-time Grand Prix Champion from Denmark
Yes, life gain on a powerful creature is important
You need Dual Nature and Paleoloth paired with a haste enabler and a way to return Baru, Fist of Krosa to your hand with Temur Sabertooth
They often feature abilities that allow you to pay life instead of mana, proliferate to increase counters on permanents, and infect, which deals damage in the form of poison counters
Ok Arceus VSTAR #184 (Pokemon Brilliant Stars) Details All prices are the current market price