I just came back from the lab with an insanely ridiculously difficult Sentinel-only combo that starts with a full charge and works anywhere on screen.
(Start with full charge charging either :l: or :h:) Jump, j., Release level 3 Buster, j.:qcb::l: (hold :l:), land, :f::h: (hold :h: and release :l:), :d::l: (hold :l: and release :h:),
, :h:, :f::h: (hold :h: and release :l:), :s:, jump, j.:l:, j.:l:, j.
, j.
, Release level 3 Buster, j.:dp::l:, land, :s:, jump, j.
, j.
, j.:h:, j.:s:, land, :qcf::atk::atk:
616,600 damage.
If you have something like Dante Jam Session or Doom Rocks you can improve it to:
(Start with full charge charging either :l: or :h:) Jump, j., Release level 3 Buster, j.:qcb::l: (hold :l:), land, :f::h: (hold :h: and release :l:), :d::l: (hold :l: and release :h:),
, :h:, :f::h: (hold :h: and release :l:), :s:, jump, j.:l:, j.:l:, j.
, j.
, Release level 3 Buster, j.:dp::l: (hold :l:), land, :s:, jump, j.
, j.
, j.:h:, j.:s:, land, Call Assist, jump, j.:qcf::h: (OTG), land, :s:, jump, Release level 3 Buster, j.:qcf::h:, land, :qcf::atk::atk:
I haven’t checked how much damage that second version does yet but to be honest I don’t see much use in this combo over my previous BnB except that it can be done anywhere on screen… but Sentinel gets carried corner-to-corner by that BnB so that doesn’t even matter either. Maybe someone will come up with a use for it though.