I think you can do Jedi Cal without any zetas. Depending on who you want to use afterwards (arguably you could use all 5) will depend on what zetas you should add. For me, both of Ceres, both of Merrins and one of Cal's (not the special) are must haves. So, if you have them you may as well add them. The other 2 I've left at Gear 12 with no zetas.
Jedi knight Luke I really can't remember well. I remember it being a bit harder. There's a lot of characters there you want to add zetas. I mean CLS you probably want all 3, and both of Chewies. However, I remember that Chewies Loyal hand and Wampa's Cornered Beast are very important for this. I also have ROLO's zeta, I remember I had to get it for something.......but I can't remember if it was for this or for a Sana squad.
There must be 'bare minimum' guides out there. However, as there are a lot of bigshot players involved here.......there's a lot of zetas you are going to want anyway. I mean arguably CLS, Chewie, 3po, Merrin, cere are as important to your roster as JKL or Jedi Cal.
