Biogenic Upgrade You get a lot of power with Biogenic Upgrade provided that you have at least one creature that already has some +1/+1 counters
Note that their ultimate is 8 loyalty, so you could drop them, go to 6 loyalty on turn three, and then on turn six, when you have 8, you can ultimate
Cheering Crowd is really interesting, and I can see it being the kind of group-hug card that gets out of hand quickly
While this Ajani's -3 helps decks trying to go wide, providing each of your creatures with +2/+2, its ultimate -9 ability provides further payoff for the lifegain of its +2, putting a number of +1/+1 counters on a creature equal to your life total
Put two of them into your hand and the rest on the bottom of your library in any order