No commentary for this but I'll try to explain via the timestamp below.
The zero turn run makes use of Free Turn skills and the fact that you can swap your backline in after taking one action, even if it's an AA.
Setup
Party 1
Freya (Keiss LDCA). I forgot to give her my UW spear.
Cissnei (Kurasame LDCA). She has 5/5 UW
Krile (Shantoto LDCA). Force level 10
Party 2
Terra (Raines LDCA). She has a 5/5 UW
Kam'lanaut (Leo LDCA)
Penelo (Seymour LDCA). Force level 13.
On hindsight I think swapping the Leo and Kurasame LDCA with each other would be more ideal.
Timestamp
0:00 Setup
Reset until turn order is Freya, Krile, Cissnei
Freya uses calls, Keiss base call targets Cissnei. Then AA twice and Jump
Krile uses Toto LDCA, then swaps to Kam'lanaut, use AA then Leo LDCA then swap to Penelo
Penelo uses Seymour LDCA, then dances until she's dry. Swap to Krile
Krile S1 until FR is 100%. Swap to Terra
Terra uses AA twice, then Raines calls
Pop summon
5:01 Summon Mode
Terra uses Meltdown
Cissnei uses Kurasame LDCA
Cissnei uses LD
Switch Terra to Kam'lanaut. Use FR
Cissnei uses LD
Freya will land, swap her for Terra and use LD
7:10 Terra BT Mode
Use Meltdowns until 2 turns remain, then go EX and then LD
9:08 Finishing Up
Coming out of BT Mode, use BT+ on the final FR Time turn. Then Meltdown and LD to victory
33