There were two main parts of this run that had to be planned around: the triple cavalry reinforcements at the bottom of the map, and L!Eirika's Moonbow (essentially Black Luna). Everything else could be dealt with fairly easily because of the chokepoint.
Dealing with the cavalry reinforcements was done through a bit of AI manipulation. By making Fae look juicy in comparison to Soleil, the staff cavalry moved in range of Soleil.
Surviving L!Eirika came down to debuffing her attack and ensuring Soleil was at max health to start (far more efficient than trying to raise Soleil's defense). The lance flier was used as a wall so Soleil would have time to take out the ranged threats that would otherwise be threatening if attacking on the same round as L!Eirika.
Rules:
- Soleil must use Special Spiral, Sol, and Distant Counter.
- Units other than Soleil cannot deal damage to enemies.