Maxing Rolling Spin vs. Maxing Final Toss

I know that Final Toss is an overall better skill than Rolling Spin, but I find myself not even using Final Toss AT ALL.

So my question is: If I don't max Final Toss, what am I really missing out on (since I don't use it anyway)?

You know... Rolling Spin is completely useless. Max Final Toss and dump the rest into rush.
Why is Rolling Spin useless? It splits the mob in two parts, and pushes them away. At monsters with magic attacks, which are the majority of monsters, they'll just attack you, making you lose a lot of potions or die easily.
Just don't apply any point on it, even at level 1, you may use it accidentally instead of final toss, which has a very similar key combination.
Just leave it at 0, dump the rest into rush.

Edit: Also... It stuns. You may think that stunning is good and useful. It isn't. Stun cancels automatically when you attack with any Physical Attack, which is Aran's case.
So, basically, you would stun monsters, and they would just lose the stun once you attack. But you may think, what about stunning them and recasting buffs?
The stun lasts 1 second, and since monsters are away from you, it doesn't work, you won't have enough time to cast a single buff skill.

it doesnt seem to work at bosses either

i have added 1 point to it, and it made training horrible back then, when i was at galloperas and i happened to use toss alot, it completely ruined toss and allowed them to recast their magic to knock me back/foward. I personally just maxed final charge(rush) and final cross(toss), and dumping extra points into booster. and that 1 point that i had in it, i resetted it because it made using toss a lot more difficult since i like to button mash.

I know that Final Toss is an overall better skill than Rolling Spin, but I find myself not even using Final Toss AT ALL.

So my question is: If I don't max Final Toss, what am I really missing out on (since I don't use it anyway)?

I think Final Toss is better. You already have a rush skill, so RS is useless.