I'm glad you posted this because it's probably worth mentioning that Emicho Coronet/+1
Path D is solid contender for best in slot with Tegmina Buffet.
Boosting the pet's STR still leads to a solid Pet:Attack+45 with the HQ version. And on top of that you're using Tegmina Buffet so the Choke effect lowers the enemy's VIT (-65), aiding your ability to potentially cap fSTR (depending on the target).
Pet stats tend to be on the low side, so it's nice if you're able to boost them with proper JA usage (Familiar/Spur with Job Point investment, Run Wild with appropriate timing considerations). Combine that with GEO and COR, like kuroki mentioned, for best results.
Level Correction zones still have boosted Pet pDIF so the damage values will continue to be inflated until SE fixes the issue.
On regular content you should expect closer to ~27k damage normally.