Rabid Nut Varmit 5000Although rather difficult to obtain due to the many possible breeds, I've found a 5/15 breed of this pet to be highly effective at taking out most of the more difficult beasts encounters. Give it a shot and see what you think.
For your primary attack in almost every situation you'll be using
Metal Fist because this pet is chosen for its anti-beast capability. Even though it's a fast breed and
Thrash would get an extra attack, it is still going to be inferior for this purpose.
During an encounter you'll want to open up with
Extra Plating and try to obtain maximum uptime (use it again when it's off cd). This and most other avoidance/reduction type defensive abilities are much more effective when you're able to attack before your opponent (the reason the 5/15 breed is so nice) because they provide their bonuses for an additional round (the one you used the ability). These abilities also typically do not use your pet's power level to determine their effectiveness (exceptions being
Shell Shield and other similar abilities that provide a scalar reduction). Some knowledge of enemy abilities and their cooldowns can also insure that these abilities are up to block or reduce the enemy's most damaging attacks.
Your slot three ability will determine what you use next - for more defensive beasts like Major Payne's Grizzle you may want to have and follow up with
Rabid Strike in this slot in order to help kill him more quickly during
Hibernate. Now you get to enjoy the benefit of a greatly increased damage debuff but without subjecting yourself to significant downside either (remember you've got Extra Plating). You'll easily dispatch Grizzle with consecutive Metal Fists and make a good dent into Beakmaster X225 (assuming Grizzle was first in the lineup) and have a good opportunity if you choose to debuff it with Rabid Strike as well. A fast critter with some evasion capability such as an
Arctic Hare would be a great followup pet to complete the battle with Beastmaster X225 and Bloom leaving you a free slot to level your choice of pet (I'd recommend putting it first with Grizzle, anticipating a possible Bash on his first move and then switch in your Rabid Nut Varmit 5000.
In other matchups against more offensive-oriented beasts or if you just prefer a more defensive mindset you may consider using
Repair as your slot three ability instead of Rabid Strike. This will be used more on demand as needed to heal your pet for significant amounts of damage. It won't be as effective on this breed as on a 4/14 power breed, but it really doesn't matter much because the Extra Plating is keeping damage levels done by your opponent so low. This method converts the Rabid Nut Varmit 5000 into an even more tank-capable pet. It's a great method to use for Fezwick on Darkmoon Island and one you can effectively utilize against Judgement before taking on the dreaded monkey. You don't really need to race to kill Fezwick and having Extra Plating on your side will swing things wildly in your favor and prevent that crazy damage from stacking up too high too fast. Just be careful not to try to use Repair when Fezwick's Clobber will come off cooldown during the charge time (I personally don't use it against him but I make sure I'm nearly topped off when I finish Judgement).
If you weren't able to get a 5/15 Rabid Nut Varmint 5000, don't despair as many of these moves are available on other pets and the most important point - try to use pets faster than your opponents if possible for defensive abilities like Extra Plating,
Evanescence,
Dodge,
Shield Block,
Soul Ward and the like. Preventing or reducing an extra round of damage can be sometimes just the edge you need.