It all depends. For most people just linking to the front page works best as it is easiest and it offers more variety for people to fall in love with and thus spend. But sometimes targeting a specific performer makes sense too.
If you are linking from a Goth/Alt pay site then your best bet might be to make your own landing page with some photos of girls in the niche and some brief profile info and then link directly to their rooms (assuming the tracking is correct and you still get paid). Preferably with a online status indicator too so they will keep checking on your page.
(If your cam sponsor allows and gives you all this). Then also add a general link to the front page inviting your visitors to look for "other girls we may have missed" as "new ones come all the time".