Hello,
Sorry but the insert routing examples you have mentioned are not possible on the H90. Two mono inserts can be routed individually at various points of the signal path, but when they are routed next to each other Insert 1 is always routed in series to Insert 2 (they cannot be routed in parallel and then processed by the algorithms as mentioned in your first example).
You can use the algorithms to process the signal pre/post the inserts with filtering, but not in a way to split the hi/low frequencies to 2 separate insert paths.
You can see a table of the available routing options here: https://cdn.eventideaudio.com/manuals/h90/1.1.2/content/edit-modes/routing.html#insert-routing
