Typhoid Rats has deathtouch, which makes a disposable blocker at any stage of the game
Some random cards id look into possibly adding would be Fight Rigging, Bear Umbra Mutant's Prey, Ancient Animus, Pounce, Prey Upon, Pit Fight Boxing Ring Rancor, Alpha Authority, Sticky Fingers, Fireshrieker, Whispersilk Cloak ect Most of my recommendations either give you access to -fighting (Which would trigger Wolverines +1/+1 counter trigger even when if its not your turn
Thats easy
Drumbellower helps fix this downside by untapping all your creatures during every other player's end steps
Unfortunately, Ghalta doesn't provide any value upon immediately hitting the battlefield, so you'll probably want to have some kind of removal protection or method of giving the Dinosaur haste to ensure casting the card is worthwhile
But if you have a creature with 4+ power, theres the added perk of drawing a card and discarding a card