R2 Help!!!!! Please!

I keep hearing people say take out R2 first but when I got him the first time and also during the Mythical event (or whatever its called) I started by killing Han, then either Leia or Luke then I move on to R2 since Old Ben and Chewie arent much in the way of damage. Also if you are using Palp make sure you use his buff immediately for the damage boost and you should be able to take out those squishier toons fast.