Actually, this combo here:
(3) [starter] > Renka (1) > Gurren > IAD j.B > j.A, 5C, 2C > sj.B > j.2A, AD j.B > j.2A, j.C
If you wanted to make it easier, drop that first 5C.
Actually if you wanted to make it real simple:
(3) [starter] > Renka (1) > Gurren > IAD j.B > j.A, 2C > sj.B > j.2A, AD j.2A, j.C