Hands in the pockets.. Reaching back with both hands at the same time to open the legs. If they do climb they are left with no attacks.. As they open to attack move for your pass of choice.. Usually double under pass.
They have to open to attack, so bait them and when they open is time to move. Dont get into a strength game with them.
My favorite thing to do is hands in the abdomen, and just stand up keeping the knees tight to the body to avoid armlocks. Once im up i keep one hand on the abdomen and one goes to the knee to open them up.
Usually they will do the shooting the star sweep, or try for omoplatta - just know they are coming and usually ill either get the pass, or ill get a crufix from them doing the sweep. Grab under their butt as they open if they are hooking a leg and just dump them over as you take the crucifix.
Watch Marcelo Garcia fighting no-gi or gi.. he almost always stands right away when someone closes the guard. Roger Gracie too.