Dbl veterans assemble! Is maining just one tag a smart strategy?

Started praying when lr bardock dropped. Summoned on every new banner, but now "beginner" resources are fading out and I'm wondering if i should just start being more selective picking banners.

Probably movies is the most prevalent tag in my account, apart from buffed units and rose/bardock. Should I just start saving to pull on movies banners only? Saiyan also seems incredibly versatile. What do you guys do? How many tags do you main and how often do you pull?