(Choose any number of permanents and/or players, then give each another counter of each kind already there.) Lulu's first ability only cares about creatures attacking you, not planeswalkers you control or battles you protect
The List works, for the purposes of protecting the value of some cards
Tourach, Dread Cantor Hymn to Tourach is an insane card to run in black decks, and having access to a creature with the same effect is absolutely amazing, despite the extra mana investment you have to pay to kick Tourach, Dread Cantor
Traditional Esper archetypes can put players in control of armies of massive artifact creatures or have them sitting back behind a wall of counter spells and board control while more modern ones encourage tons of token generation and card draw combos
You can see the package below (although I wont spoil what is inside for you)
From Chain Veil-wielding necromancers to eldritch abominations, there's something for every Magic player to sink their teeth into