Drivers are also I believe learning 158 & 175 for moves onto Canton depot/Cardiff west (although that may well change by resigalling). As has already been said 142/143/150/153 are the main traction as it stands.
Routes for Valleys are Treherbert/Merthyr/Aberdare/Rhymney/City Line/Coryton/Bay/Penarth/Barry Island + Canton depot & Rhymney/Treherbert sidings
Barry-Bridgend is covered by Cardiff Mainline, as are Ebbw Vale and Maesteg
Drivers will also be passed out on 153s, which are used on the Cardiff Bay and Coryton branches.