-Pre-Chapter Shopping: Bronze Axe, Bronze Bow, Bronze Lance x2 (as necessary to have that many in the convoy), Flux forging for +3 Mt.
-Tonics: Robin (Mag, Def), Lissa (Mag)
General
-44 Attack Robin can one-shot any non-Aegis+ mook on the map (so long as it’s not on a Fort); just 42 is enough to neutralize any possible Counter melee.
-Libra will attack Dark Mage if at full HP.
-Level 10 Lissa can expect 10 Mag. With Tonic and Ricken, Rescue range can be 8. This is usually enough to save Libra.
Setup
Turn 1
-Pair Chrom to Robin. Move 4 tiles down. Kill Soldier from 2 tiles away with the forged Flux (unless none of the melee have Counter, then use Thunder).
-Pair Lissa to Sumia.
-Pair Ricken to Cordelia and move her to right above Sumia.
Turn 2 (Soldier Goes Up)
-Move Robin 4 tiles left, and drop Chrom to her right.
-Move Cordelia 1 tile below Chrom, then possibly 1 tile to the right of that (depending on Dark Mage movement) and wait.
-Move Sumia below or left of Cordelia (depending on Dark Mage movement), swap to Lissa and take Ricken. Rescue Libra.
-AP: Libra recruits himself on Chrom.
Turn 2 (Soldier Goes Right)
-Move Robin below Soldier, swap to Chrom. Wait.
-Move Cordelia to Chrom’s left, swap to Ricken, transfer to get Robin. Swap and have Robin kill the Soldier.
-Sumia goes below Robin and swaps to Lissa. Take Ricken and Rescue Libra (requires 10 Mag on Lissa plus a Mag Tonic)
-AP: Libra recruits himself on Chrom.
Turn 3+
-Pair Chrom back to Robin and clean up the goons chasing Libra.
-Reinforcements are six Wyvs (3 melee, 3 ranged) on turn 5. Move a forged Wind/Flux-equipped Robin be above the top 2×2 set of Bones to get them all in one turn. Note that all other characters should be 2 or more tiles below that same set of Bones.