Ryan, that's a natural crotch, double-whip tackle...I'd use a stub or sling and biner, possibly with a munter hitch if catching a bigger piece. You split your load, so need half the friction to hold a piece, need to apply half the normal friction to let it run.
Natural Crotch speedlining is also very doable...choke the rope to your bottom anchor before you go, adjust up top on a stub.