Been messing around with Valk on training all day yesterday and trying some of the combos here, awesome work guys and here's an improved one of the 4th C starting mid-screen combo
[H] CH 2C > j.C > 5B > 5C > 236A > RC > 2C > 6B > 5B > 5C > 236C > 9D > j.AAA > 236A > 236B > j.CD > j.B > j.214B > 9DD > j.B > dj.B > j.C (> 236236C) (5864 (6984) Damage, 57% MG Requires 33 (43) Heat)
Tested on Tager, Noel, Carl, Ragna, Lambda and Arakune so I am guessing it works on all characters. For some reason the second hit of the 6B can whiff on Arakune sometimes its annoying.