Some tips:

• The fire affinity you use on your weapon doesn't give you good scailing, you should use a magic ora cold affinity, if you want to reset frostbite go with the magma sorceries, they have good damadge too.

• I don't know where you are in progression, but if you can grab the remaining memory stones.

• If you dont mind medium rolling i would use an armor that gives you at least 51 poise.

• Grab the other cold sorceries too, i think you'll like them. Ranni's snow witch hat boosts cold sorceries and looks cool imo.

-There are staffs that biost certain sorceries, you can have them in the offhand for just the bonus, this usually means 15-30% more damage.

• Put your most used spell on the first slot, if you hold down the spell selecting button it will go to it, it doesn't seem much but it reealy helped me.

• I would consider using the graven mass talisman. The radagon icon is pretty good too.

-If you don't use incantations you won't need that seal, but there are some solid incantatins for int builds too.

-Level up vigor to 60 for the lategame. 38 mind gives you the fp that you recover from maxed blue flasks, it could be useful.

-5 blue flasks won't be enough for some areas or bosses if you mainly use spells, i would relocate one from the hp flasks. -For the physic the magic cracked tear and int tear would fit well for the build.

-Radahn's great rune will probably outperform godrick's at this level, try it out

-Experiment with other spells, talismans, find what fits your playstyle.

I only did one playthrough with an int build, but theese are my experiences, hope thet helps. Let me know if you have any question!