Heya! I like the deck idea overall, Temur is a great color combination, and Animar can be really explosive and fun.

You already have some cards here that have +1/+1 counter synergy - I would say go all out with this prong of your strategy.

Hardened Scales doubles the speed with which Animar builds counters, and helps all the other +1/+1 counter triggers get better.

Longshot Squad, Sapphire Drake, and Tuskguard Captain/Crowned Ceratok give Animar (and anything else with a +1/+1 counter) Reach, Flying, and Trample respectively.

Ridgescale Tusker enables your board by putting a +1/+1 on everything but himself, and accelerates Animar futher.

Shaman of the Great Hunt might be good for some mid-game card draw, and helps spread the +1/+1 counters around.

Creatures with Kickers and X in their CMC are also great choices, because they can really benefit from how big Animar's reduction can get. Some ideas are Grunn, the Lonely King, Altered Ego, Fungal Behemoth, and Verdeloth the Ancient.

Okay, one for the lulz as well. Big time synergy with Animar's Protection from Black coming from Singe. Problematic blocker in your way? NOT ANYMORE! Singe makes them Black until end of turn, so Animar can swing through for the win. YEAAAAAAAAAAAAAAAAAAHHHHhhhhh...

So, I like what you are trying to do here, and have even seen a few things that I may need to borrow, like running Anger. Idk if you have looked at other animar decks on the site, but perhaps you may see some interesting ideas in my deck like I have in yours. animar is the link if you are interested.

Btw, a fun combo for this deck, casting Blasphemous Act with Vigor in play. Synergies really well with your counter focused deck.