Garrisons with police brigades on anti-partisan activitie will lower the partisan level as well, although with the new patch lowering partisan activity per month they are much less usefull. Still you could garrison somewheres and when the partisans are gone you could redeploy the garrisons to guard Islands or beaches.
Well, unless you want to use a part of your main army keeping them down I would make a bunch and use them when you first take someplace over so they don't keep revolting. Then the partisan level is low you can redeploy where needed. --- There are no heroes in war.--Metal Gear Solid God didn't create humans, its humans who created God.
i use garrisons with military police on every province that has partisan activity. and every other brigade such as infantry and panzers are fighting. all the SS divisions is better to fight partisans that the others.