...Bother making a Hayato for the Link Skill?

Perhaps, instead of a limit on the number of Link Skills, there should be a limit on the sum of the levels of all your link skills, making it so you can choose between receiving level 1 or level 2 of a link, so you don't have to have a level 70 and a level 120 link skill mule, and they'd have to make the Cygnus link level more linearly rather than +2%, +3%, +2%, +3%, etc. Then you can choose level 2 on all the really good links, and then go level 1 on less useful ones, or forgo them altogether. Not sure what a good limit would be for that system, though.