poisoner = a character that focuses on poisons
it can be very cost heavy, and requires one of a couple tricks to bypass poison immunity.
you can get the save DCs surprisingly high, startling even the most experienced GM
i have a PFS character named Krombopulos Michael that does all this, and is lots of fun.
he will soon have a chelish deathapple (DC 33) and can be combined with concentrated laxatives in a single attack, both have no onset period. or drop the DC down and get an insane number of doses out of one apple.
diseaser = a character that focuses on diseases, and inflicting them on baddies.
worshiping Urgathoa makes you only a carrier of any healed diseases
force someone to make a couple dozen saves against your diseases as you hug them.
then force them to immediately save vs. any/all diseases they have regardless of the normal onset or take the disease effects
diseases are surprisingly easy to get and make custom, using plague powder
ritual focus = a character that focuses on occult rituals and making them easier, faster, and cannot fail the checks required.
making an entire party become liches for only 120k? easy
want a 13 member coven? got you there
power ranger = a synthesist summoner, that can be overrated by some, and OP by others.
dimensional pouncing = focusing on the Dimensional Agility tree here
is a pretty simple video on a build to do so (not my video)
personally, i'd go magus over multiclass wizard, but i never even thought about the teleportation subschool