If you guys need help for a team, mine gets around 1.5-1.6M points:

Deemo (LDR)(A) Legwand

SGX (A) Steeple Rose Dandelga

Melchio (A) Batootha

Miku (B) Providence Ring

Michelle (A) Medulla

Grah (LDR)(L) Legwand (preferred)

Kit: Defender

Order of attack: Miku, SGX, Deemo, Michelle, Grah, Melchio

First Battle - Drop a DEF pot and flute and attack Jona then Legion. After Legion, use all out BB/SBB attack until both are dead.

Second Battle - Drop a DEF pot and all out BB/SBB attack. Use heals if a must.

Third Battle - All out BB/SBB attack. Use heals if a must.

Fourth Battle - All out BB/SBB attack. Use heals if a must.

Fifth Battle - Drop a DEF pot and all out BB/SBB attack. Gravion might take a extra turn so just use basic attacks until he dies.

Sixth Battle - Drop a DEF pot and a flute and all out BB/SBB attack. Use all your BBs as you can and wait for Michelle's and SGX's SBB to use. He uses 2 Hollow Finales so use basic attack until he dies.

Seventh Battle - Drop a DEF pot and all out BB/SBB attack. After, use a flute and use basic attack and use BB/SBB once obtained. When DEF runs out, throw another one on. After she drops below 25%, use another flute and attack. You might not kill her, but you get loads of points.

If you have any other questions, just ask me.