Do the LAX-PTY J class runs. About same price/EQM but all confirmed in business seats.
Also, I'd reconsider going for EXP. You now only get 4 SWUs, they're hard to confirm at booking, and you may be better off just using the money to buy a J ticket when you need to travel and be free to pick any carrier. And, if you're a budget traveler, keep in mind the change to spend based upgrade prioritization that could have a big negative impact on complimentary upgrades clearing as well as SWUs if you end up having to waitlist for SWUs.