Even if certain specific archetypes don't necessarily gel with me personally, I enjoy poking around with them to see what can be done & am enjoying seeing the different combinations of capabilities.

Something in particular I've noticed is use of "adds X effect when you cast Y spell" - blightcaster has multiple of these & that gives me hope for a revamped archmage tree where specific schools don't just get SLAs & DC boosts for specific schools but entire new benefits, but with the number of different schools & having effects for all of them that'd naturally be very time consuming; I can see a specialised evoker being a definite possibility since yay blasty power, but other possibilities could be a transmutation specialist that'd have the ability to tie in well with either a more overtly spellcasting-focused style (combining with the pale master tree) or a more physical style (combining with eldritch knight).

Similarly, sacred fist has spells with 0 SP cost & ki cost instead (but can accept metamagics to boost them by spending SP, nifty) which opens up more possibilities - a sensei type one which gets the benefits of bard-style buffs & a selection of spells, that eschews the elemental approach for one that focuses far more in the light/dark/balance philosophies could be very interesting.