Some of my players are fulfilling both of her drives every session, so I want to know how many sessions I have before I need to add some new options to choose.
The Advancement list is in the Root Core Book on the page 175
Without checking every playbook, most Vagabonds can/will have a total of 23-25 Advancements before their default peak is reached:
I do not see anything 'balancing' the Playbooks with a fewer/greater number of Roguish Feats, but I'm guessing they decided it was
Root's first (on-release) supplement, Traveler's and Outsiders, adds Masteries (p69). This adds a new Advancement option (which I will split into 2 for clarity) that total 4 additional Advancements:
It also provides an optional subset of rules (even more optional than including the book or not) that allows Vagabonds to spend an additional 2 Advancements choosing "Species Moves" (p60) that do not count against their Playbook Moves.