Hmm. I’ll admit, the Instant Charge was inspired by Utahrinex.
What if it had a Cunning Rampage, Fierce Strike, and kept Cleansing Impact and Acute Stun? And Instead of SI-Savagery, it would have an SI-Cunning Strike? Maybe either that or a SI-Acute Stun, to guarantee a safe switch in (unless the enemy is highly resistant or immune to stun). It would still keep the Acute Stun to try and stall out the 2 turn lockdown it has.
So it could be:
Swap-In Cunning Strike
Swap-In Acute Stun (CD: 2 turns)
Both sets would still be immune to Swap Prevention. To be perfectly honest, I can see it doing SI-Headbutt if one wanted to stun while still attacking. I only say that because of the Pachy model it has. Nice to see Pachy models have a headbutting move.