A lot of the coloured cards you play are things you play at the end of your curve and so the burst this offers typically isn't useful
As you can imagine, under these rulings, your blocking Lifelink creatures could deal Lifelink damage in combat, and you could still tragically lose the game to your opponent's unblocked creatures before your Lifelink triggers go to resolve
Witch is a more than decent addition to any blink decks that may need some extra support
Its a nice way to get your Prowess triggers going, and it pairs nicely with Monstrous Rage to enable some explosive bursts out of nowhere
Cheer Whenever one or more creatures you control with counters on them deal combat damage to a player, you may draw a card and proliferate
Like any Voltron deck it does basically nothing if Stangg gets shut down, but Stangg is so underplayed that many tables with seriously underestimate what this powerhouse can do