I'd think either a trinket or orb could be built that would be reminiscent of the Magestar. Maybe it would absorb spells like a jeweled cloak and generate over time a small amount of SP or HP that could be used like a heal or mnemonic pot. If it were a trinket, I'd consider making it an upgrade to the planar focus trinkets that added a mnemonic clicky like the bauble. If tech allowed I'd have the mnemonic clicky regen as spells are absorbed.
I think its also time for a named 10% and 20% healing amp augments (assuming you aren't planning to make normal augments of this type). I'd put the 10% in the main quest line and the 20% at a reasonable drop rate in one or more of the tougher extra bosses. I'd normally throw corresponding repair amp in at this point as well, but I'd have to think about that given the trend towards using bladeforged recon as the basis for many self healing melee builds. It would be only fair to add repair amp, but it might skew things to far in favor of bladeforged.
Named School focus items for useful schools would be nice along the lines of the illusionist gloves except enchantment, conjuration... Throw in the appropriate stat at a 10 or 11 level and lore or spell pen or... but make them consolidate slots in a gear set, not provide a useful effect or two and a useless effect or two.