BASKN is the FAF - this is where 3 deg slope counts and points before are not subject to the "slope" rule. Also 2600 ft is the minimum allowed altitude at BIDPE, so yes, this is your altitude check, but better be not lower than 2600. Yes, this is your typical non-precision approach so there is no glideslope/glidepath. If you flew this approach in some lowly Cessna you would have no information about your vertical performance except the altimeter.