The way this Build works is that you'll hold the Meteorite Staff in your left hand in order to give you a passive increase to Gravity Sorcery damage (+30%). You'll then cast with the Carian Regal Scepter in your right hand because it has better Sorcery Scaling at higher Intelligence levels. This makes your Gravity Sorceries hit extremely hard.

You'll use Collapsing Stars and Gravity Well for trash enemies as these are easiest to use in these type of encounters, and remember these spells PULL enemies towards you. You can pull them off edges or down to you, and then hit them with Spinning Weapon to finish them off if needed. Both these spells deal Magic Damage and can be charged, so benefit from Magic Scorpion Charm and Godfrey Icon. Charge them when you can.

Rock Sling is there when you need Physical Damage, or are trying to stagger a Boss. It's hard to use in close quarters so it's very situational.

Meteorite and Meteorite of Astel are used to take down large packs of enemies or large Bosses that have huge hit boxes. Hold down the spell to continue dropping Meteors on them. Use the Cerulean Hidden Tear to remove the FP cost of these spells for 10 seconds when slotted into your Flask of Wonderous Physick. This will allow you to nuke them for a very long time without FP concerns. Meteorite of Astel casts many more Meteors, but costs way more FP.