too many options possibilities!
1) (a) if you feel you can hit a winner in the corner, since your pulled out wide it's not really "down the line" (I mean it is but it isn't!!), or (c) if your not in attack mode - deep cross court will give your opponent the least options other than hitting the same winner I described for you to do in "attack mode"
2) (b) - cross court drop shot would probly be safest and you can cover their possible responses because your already on top of the net, keep the drop shot low so they must hit up to get over the net, then POW - put it away!
3) (d) dropshot from the backhand baseline? not adviseable but it is possible, change it up and go down the line - also possible but your giving it to his stronger forehand - but if you rush the net with this shot you may spook him into an unforced error, for me, since I have a strong backhand, I would probly keep up the battle and wait for any other opportunity.