It is harder to drop and attack the legs while standing off an overhook but somethings, ankle picks etc. are still an option. If already grounded the overhook stops the back take and can offer certain choke set ups.

For now though our main point is this, underhooks are good at lifting, overhooks are good at smashing.

The interaction between overhooks and underhooks is a bit like rock paper scissors with hip position being the third element. That doesn't really make sense but the point is either can win depending on who has better hip position. If the under can build their hips in close, they will have the advantage and should win the exchange. If the over can keep distance between the hips, they will be able to build pressure in the back of their opponents shoulder and smesh them, and they should win the exchange. So again, like Ritchie at the lamplighter, it's all about the hips. The overhook can exert tremendous pressure on the underhook, but only if it can apply that pressure to the back of the shoulder. If the under can get close and tight, the overhook is negated. The over needs to find another solution, frequently a kick up to fix the problem ( think uchi mata).

When things are going well for the over one of the best options is to run the under to front headlock. The over can initiate this sequence themselves with a kickup, but it can also begin when the under tries to move below the pressure and attack the legs or build back up. The over will turn the hip in hard, and slide their inside foot out front so that they are on a diagonal, putting all their weight into the under. From here they step the outside foot over to take front headlock, remembering to keep the back of the head in the middle of their chest. This two step pattern keeps weight on the opponent the whole time, never opening up to the double. This motion is a big part of playing the over.