85+ Tanking Guardian vs Pally

historically I've always multiboxed with a paladin but due to the configuration in which I levelled my solo monk (which as my only raid geared character I would like to pair with my team when I get them to 90) in order to stick with a paladin tank I would have to do a character transfer. I do know that guardians seem to have some issues with squishiness at 90 and that they are currently unfavored for raiding for that reason. Is there anyone that has tanked with both this xpac that would care to share their opinion?