Ever since I got WAR lvl'ed my NIN was shelved from merits. Last nite I made a bard+cor party where the bard did not mind my going as Nin at all, unlike many other bards. So I went to tank and DD as NIN along with two WARs, after a long time break of NIN. Party lasted 2 and half hours for me.
The first 1k Jin on Puk made me wow because I don't think my Jin ever went to 1k in merit before. I thought that's a one time occurrence. I noticed lots upper 900 on Puk, 700 on Mamoos, along with the sometimes lackluster 400s. Then, 1k happened quite regularly every once in a while, and I even did a 1k on mamoo (but it only happened once). Woot. Then, 1.1k on puk, I was like cool, then 1.3k on puk, cool, and shortly before I quit, 1.4k on Puk, by that time I was amazed. I did not know my Nin improved so much after I merited 5/5 STR. I out WS'ed the war/nin quite often, but the war/sam was doing more most time, apparently.
Even after war/sam got killed and weakened (only happened once), we maintained the chain till he's back in full health. The COR was a good dd.