The wiki seems to have left out some of the common place holder names for the brute and sarnak cycle. The Southwest placeholder can also be "a mountain giant hillock" the same as the goblin and burynai cycle. Back when I first started doing this cycle I used this site.
http://www.paullynch.org/eqblog/?p=44 On the p99 wiki it doesn't list "a sarnak dragoon" or the "mountain giant hillock" as the common placeholders on that cycle. So sometimes you'll see multiple hillocks up in the SW , I just kill any hillocks I can track in the SW because they're for both cycles, also in the NW Goblins will fight any of the sarnaks that spawn if they cross paths, sometimes the goblins will kill the sarnak you spawn before u can get up there and start the cycle over I've noticed