Strange course. Gate means nothing if the next leg is a port reach, so the mark to the left is meaningless.
Agreed...this is a simple mark rounding for the right mark.
Best chance is to get setup for the reach early and get a jump on the competition. You won't have any rights to get inside of anyone at the mark and to go below them will mean sailing in all their dirty air. I think the strong choice is to time a screaming reach to go over them just past the mark while they clean up from their gybe...but they are still in a pretty defendable position. You could possible gamble on the distance they'll loose in their gybes and just try to blow under them through their lee...either way, it's a difficult pass to make.
That's a pretty silly finish course. Looks like you really need to plan ahead and setup that mark rounding to NOT come in on port.
