I don't use 2HS as much as I did in Accent Core and haven't fully tested it in GGXrd, but here's some stuff I know will work:
CH 2HS> 6H> 214K,P (Anywhere)
CH 2HS> 6H> 214P,S> c.S> j.SKD> j.2K> j.PD (Corner)
CH 2HS> 6H> 214P,S> c.S> j.SKD> j.2K> j.PK> jc.KD (Corner)
CH 2HS> 6H> 214P,K> 236236H> 6H> 214P,P (Corner)
CH 2HS> 6H> 214P,K> 236236H> 5H> j.SHD (Corner)
CH 2HS> 6H> 236K> c.S> j.PKD> j.2K> j.PD (Faust/Mid-screen)
CH 2HS> 6H> 236K> c.S> j.D> jc.KSHD> j.2K> j.PD (Faust/Mid-screen)
And for non-counter 2HS in the corner:
2HS> c.S> j.SKD> j.2K> j.K> jc.SHD
*EDIT: The two combos listed for Faust may not be limited to him only