^^No.
Would it be best to peg the the needle to about ever so slightly onto the positive side of the window past the bias target line to slightly compensate for the higher voltage, therefore theorically hitting the proper bias point when and if the voltage were to be 117.5? Or should I bias to hit the target line even though my voltage is higher than 117.5, and in actuality 118-119.5?If anything you might set it ever so slightly low so as to have the same dissipation. The problem isn't at idle- its at full power. Since your B+ voltage will be higher, the plate dissipation will be higher too. At full power you won't have as much margin left.