1- u should check my charms before talking:
i gave freeze to feral due i know is tankier, i didn't gave curse to sphinx cuz i thought it was crypt warden, and that 15% is way more notorious.
2- low blow vs % charm, here the only thing is that young goanna have considerably more hp, and low blow only affects the selected mobs, so is a 8% to do 50% more damage vs a constant 10% of 310 damage in all them, in ogre rowdy a % hp damage is simply bad for a damage charm, so eitherway any charm is meh for them, both due population and due low hp, im unsure of the "new" mechanism of low blow tho so maybe here i was wrong.
3- i said that parry is worth on manticores EXACTLY due there's a lot of them and u CANT use freeze on them due u must use freeze on feral sphinx otherwise u will be using death charm and neutral charm in the other 2 which isn't optimal since u will be missing a lot of damage, specially because the low hp of manticores, manticore spam A LOT of powerful damage which u can return, all the rest of mobs do not or have way more hp which help setting better charm for them.
4- i said that not parry on ogre sage because parry is a charm that is based on their own damage, nothing else, if ogre sage doesn't do enough damage (specially due idk if summons reflect damage) then it would be turning into a useless charm, an offensive charm have a constant (low) damage that we can quanitfy, so is "safer" to say that it would be worth on them
i think that you should take more stuff into consideration than just the charms that you are using, if you already thought that your charms are the most optimal why then u come here asking on first instance?