What exactly does F2 do for you?, cause for me it just brings up that little none interactive popup screen which shows fps, instances, world ID and whatnut. It does nothing special in the game itself, i can just move, attack, dodge, jump and everything like normal.

Also, work with portals, when going to a new island, put down a portal, significantly drops the time on corpse runs. However how far are you in the game, what armor do you have, do you use a parry shield, what food are you using, that's important information.