Intelligence Attunment Help

I am making a 50 intelligence build, soul level 120. Ill use moonlight grearsword and magic rapier.
Also the only piece of gear im wearing that boost my magic damage is crown of dusk.

My qeustion is about my attunment slots. I definitely want dragons breathe, dark bead, and pursuers. Thats four slots. Im wondering if i should invest in more attunment for soul spear (i dont care for chsm)?

The only times i can get a hit with a soul spear is if i time it right before their roll or during their attacking animation. It does lots of damage but often times their attack animation strafes their body in a direction and my soul spear misses. At this point dark bead is better because the damage is higher, casting spead is the same, and area of affect is larger.

Im thinking maybe 5 attunment and placing a second dark bead or 1 crystal soul spear (though i would only get 4 casts).

Your thoughts?

If you just want what you say, go with level 16 Attunement, if you want to add CSS in there, get 19. Many people stop at 16, 19, or 23 when making magic builds.
Chaos Rapier is the strongest rapier for backstabs and ripostes that you can get besides a buffed rapier at 40 DEX.

Hmmm yea true forgot i can use other upgrade paths for my rapier. Yea im thinking 19 attunment stat at the moment. Though my main point was if anyone has any reason that i dont know of that makes CSS a must have.

There are tactics like casting dragons breathe then switching to the faster CSS to throw them off but that only works on a few.

Alright. Though im very good at timing spells haha especially dark bead. Also i have a range tyoe spell with the moonlight greatswords rt which is deadly when combined with pursuers.

One last qeustion, or two maybe. I switched out the rapier for butterflyhorn- good choice?
Is the crown of dusk really needed or would the mothers mask be better?
Also when using pursuers which would go best with it: moonlight gs rt, spear rb spam, or arrow "spam"?

Thanks

Nevermind haha. It may conflict with what i said earlier but i decided on crown of dusk, 5 attunment (all the ones i wanted plus hcsm to keep them on their toes), moonlight greatsword and bow as main weapons. The bow will make up for the "lack" of range because 4 uses of CSS is not much and dragonsbreathe/hcsm will also be effective range spells if used right.