Just got back from vacation, so a belated Happy New Year to everyone. Thanks for the awesome advice guys, it's really good to see that people are willing to help newbies out around here. On to a couple of specific replies...
Up until now I've avoided putting any time into Ragna aside from his most basic trials simply because I'm not a huge fan of the character, but based on what you and the others are saying it seems like it would be a pretty practical investment. I'm pretty terrible with full-circle motions (never really had to use them all that much) so I may just grind some of those out with Tager. And definitely share anything you find as you become more familiar with the character, if you don't mind!
Hmmm, all good stuff to know, thanks! I've never been particularly fond of characters with DP-heavy playstyles, so if I put in some time with Ragna limiting my dependence on that move shouldn't be too difficult (even if it means I won't be playing him to his full potential or whatever, idc). I'll have to be careful not to become too used to his 5B, though... and maybe I'll do some work with Noel afterwards.