What you actually doing in Baja? If it's racing go mousses. They are the only true puncture proof option. If your just play riding I would go tubliss but my XP with them is vastly different too yours. I found my high pressure bladder lost 3-10 psi every week for a few weeks then thought better of it. As for slime I've not used it on my tyres I just use tyre soap, sounds like your Tyres are the issue over the tubliss.