In my opinion ranks IV+ have too much HP. In general star ranks in particular, even if you have a party of eight with potions and all that, don't feel like they are economical to actually fight. They do too much damage, which means the healer is committing a lot of GCDs, and take too long to down VS everybody just rolling on a Death cast. When the alternative is Death spam, it feels like it's not worth the effort to actually fight them. IVs are doable, but don't feel like the reward is sufficient. It seems the community generally agrees, feeling it's better to group up multiple smaller rank enemies and nuke them; even if they have a lower drop rate, it is such that it's still better.

Speaking of potions, I am getting a lot of gatcha energy from some of these fragments. For example I've farmed loads and loads of awakenings when I started out and barely got any tank essences, getting stuff for roles I don't really want to play instead. And even if it's encourage me to try other roles, that might be more feasible if I didn't have to lose my lost actions on account of wanting to switch to something that suits me better. You can't win.