I got Destina at 1-4 + Charlotte on my first multi-pull. I'm not sure if I should try for a different 5* or not, I really only wanted Destina so getting another 5* out of this re-roll was a bonus and I don't want to try my luck for Sez/Ravi/etc. I'm not sure how important tanks are, though.
Edit: Eh, I kept it. I noticed that there aren't a massive number of tanks in the game that are 5*, and I know how useful they can be for PVE content. I figure with a 5* healer + 5* tank, I can fill in the DPS slots as I go. Silk is also free and apparently really good, so I'll use Kiris until then.
I was tempted to try for Sez/Ravi, since I still had 29 multi-pulls to go, but I know what greed can do to a person. All I wanted when I went in was another 5* to accompany Destina, which I got. I'm happy.