If you drop PARA onto forts, you might need to rethink their use. They have enough problems just dropping onto an objective and fighting through the airborne assault penalty.
Actually PAR are very potent troops, with some research involved you can drop a 4xPAR division, add some penalty reduction, good leaders ( 4skill OD guys, not those useless commando guys ). For GER I also create them by upgrading initial INF - means they have 40% EXP instead of 25%, 15% of additional bonus. End result is a powerful combat div, that can para drop.