No level rider bitches gmg flat dcs still too high
Casting classes expert at 5, master at 13, legendary at 17
Spell durations x20, any reductions in duration are also x20. Cap of day if extended longer than a day. Day or longer do not increase duration
Potency runes can be applied to wands/staves/arcane focuses to hit, save DCs, and caster checks (counteract)
Armor and weapon proficiencies, once trained they always match your characters maximum general proficiency in armor and weapons. Champion, fighter and other archetypes that offer expert instead allow master proficiency (if already an expert)