I wouldn't really call them situational, a SSR pride will almost always be better than a SR assault and sometimes SSR assaults.

As far as I've experienced, there really is only 2 scenarios. One being fights that are so ridiculously easy that you clear everything before you can take damage and then there's everything else, even if the content is 'easy' but if you're taking any damage, it's better than any SR, heck, it's probably better still even at full HP. You don't need to put yourself in a near death state to use a pride weapon, having around 80~70% HP and your pride weapon is already as good/better than a regular SSR assault of the same skill level and far better than a SR weapon.

And even then, in any fight that actually matters, you will undoubtedly be losing HP.