BST, SMN, and PUP can all be subbed and still potentially make use of a pet. /BST is limited to charms, and /SMN and /PUP are limited to gimpy half-level pets, but they still technically can have pets!
Damn, of course they can be subbed, I totally overlooked that. /blush
Edited, Jan 23rd 2013 2:36am by Kragorn