Elaborating on my previous answer:
Manifest Mind is a great ability for blaster casters!
Carpet bomb behind walls (including walls you created yourself!), while locking the enemy in. Shrug off control effects on yourself and keep blasting. Extend the range of your spells. Position Rime's Binding Ice or Cone of Cold exactly where you want it without sacrificing your own positioning. Make things like Thunderclap or Thunder Step or Thunderwave into ranged AoEs. Scout through walls and leverage that information to deadly effect. Or cackle as enemies use an Action and third level slot to dispel it, only for you to get it back with a 1st level slot and a bonus action.
Master Scrivener gives you more scrolls, which means more blasting resources. It also gives you a free slot and upcast of something like, say, Rime's BindingIceShock, which is a top shelf blast + control spell.
And there's just the general fact that it's a Wizard instead of a PHB Sorcerer, and thus has a lot more spells known, from a meaningfully better list that has a lot of critical tools for the damage-dealer role.
____
Another fun trick you can do with Scribes + Tempest is that if you take Tempest to 6, you can do some mean things with the Thunderbolt Strike and multi-hitting spells that got their damage type swapped to lightning. For example Ice Knife can hit twice (and thus activate it twice), and Wall ofFireLightning can hit over and over again, knocking people back and forcing them to have to go through the wall again for extreme pain that doesn't allow saving throws. Or use Magic Missile to for cheap, guaranteed pushes into hazards. Hazards that also are made of lightning, and thus also push people, bullying them even further!