I Do Not Understand! Chapter 20 - Fire Emblem Engage Anything Goes Maddening LTC

Chapter 20 cleared in 1 turn, leading to 39 turns so far in this maddening LTC by ‪@keb4007‬ and me. We don't understand how we forgot to mention in the commentary, but this is the second clear in the run that has 100% chance of success.
The attack benchmark for Sniper Citrinne to one-shot continues to rise, with her needing 65ATK here to kill Griss after Draconic Hex (48HP/34RES). Relative to the 63ATK required in the previous chapter, Citrinne gains Alear personal and can thus afford to lose 1 momentum, as we set up in this clear.
Reclassing:
- Lindon to Royal Knight
- Timerra to Bow Knight
Key unit levels:
- Alear 2.52
- Chloe 10 lance flier / 4 wyvern / 8 sword griffin / 7.66 lance griffin
- Ivy 9.68
- Kagetsu 11.81
- Panette 2.06 (not deployed)
- Citrinne 3.92
- Hortensia 3.49
Blacksmith:
- Engrave Bolganone with Sigurd
- Engrave random weapon with Lucina to remove it from Spear+4 (so Chloe doesn't double a wolf knight for Kagetsu to kill)
- Engrave Croissbow with Lyn
Skill inheritance:
- Lindon inherit Mentorship
- Timerra inherit Canter and Mentorship
Cooking:
- SPD+4 meal, for Ivy to double Griss
Arena:
- Kagetsu*3
Staff Expenditures:
- 1 Warp
- 1 Rescue
Booster usage:
- Ivy: 1 dust (7 total), 2 icons