Coleridge is regarded as the most vigorous mind among the English romantic poets of the first generation. The items generated tend to be more powerful than those found in the Dungeon Master's Guide. Before casting a spell scribed in a spellbook, it is usually necessary to MEMORIZE the spell. Our gear would reduce the cost of casting spells from each school of magic by 50%.
Resist Magic gives the target % reduction in the damage inflicted by offensive spells. While item creation costs are handled in detail below, note that normally the two primary factors are the caster level of the creator and the level of the spell or spells put into the item.
Magic, if anything, has simply gotten easier to level overtime, but lacks versatility (seriously, stun locking dragons to death is boring). Just like a storybook wizard holed up in his tower surrounded by spellbooks, the more tomes of knowledge you amass, the more powerful your enchantments become.
Such as the Sorcerers have staves and other magical items that are extensions of them selves(of spells course most people already knew that). Magic items in Critical Role are created by Matt himself, and he uses a specific spreadsheet template to explain all the details to his players.
Since adding two effects does not weaken the strength of either enchantment, you could theoretically reduce the cost of casting a spell within two different schools of magicka by 100%. If quirked powerstones aren't adequate for enchanting, the cost of other enchantments will be raised, often very significantly.