I am a SK 82 with TSS gear (30k hp, 4400 AC, 700 AA) with a j1 healer. I took out the fabled triloun in the entry way, which was a tough fight, but I did not have to use HT, LT or disciplines besides carapace and the epic click.
A friend (SK 72) joined me a bit later and when the razorfin finally showed up we killed him in about 2-3 minutes. He hit me for 4,1k at most (usually far less) and the most annoying thing he does is to summon you. Being summoned means you are at the floor of the cave and cant see him until you can find him again above you.
As far as I can make out the spawn cycle, it is like this: a large piranha can spawn in place of a reef piranha, and the named can spawn after a large piranha went down. We got our first after 40 minutes, and the second 2 hours later. Not a superfast camp, but there are far worse :)
The sword proc is nice and I had a pet (or two) up almost all of the time when I used it. The little guys hit for up to 369 (I have no pet AAs to enhance them) and tripled often.
At his second death he also dropped the Fabled Coral Headed Mace, which should be on Gigadon according to Zam and is not listed among his drops.