[GBF] Agastia (Impossible) - Kengo Magna Light (S. Seruel + 2 Grands)

Grid and Summons at the end
A cleaner attempt at Agastia. This time cancelling the 75% 10-Debuffs Omen and 60% 30-Hits Omen.
This comp can cleanly clear 30-hits without pressing any other skill during the turn it is to be cancelled. Count and breakdown are detailed below.
10 Debuffs Breakdown:
If you let [All-Range Hell] (15M Skill DMG to cancel) on the turn prior pass through: Cosmos S1 to dispel the Debuff Immunity first.
Beelzebub Call (Trance Lv. 3) - 3 Debuffs (DEF Down, Debuff Resistance Down, Bore)
Fated Chain - 1 Debuff
Miserable Mist - 2 Debuffs
Cosmos S2 (Blast Erasure) - 2 Debuffs (DA Down, TA Down)
[Attack] Phase (Turn CA Off):
MC Normal Attack with Carrom Blade buff - 1 Debuff (Delay; this is only counted if Agastia has at least 1 charge diamond counter)
Cosmos Auto-Blast Erasure on Normal Attack - 2 Debuffs
11 Debuffs total
30-hits Breakdown:
MC double CA - 2
Yukata Narmaya Plain DMG each MC CA - 2
Seriel CA - 1
Cosmos with Halo Attunement CA - 2
Cosmos with Halo Attunement Sweeping Detonation on 2 CAs - 12 (6-hits each CA)
Chain Burst - 1
Seruel 10-hit Skill DMG after Ascension Chain Burst - 10
30 Hits total, exactly by just attacking.