bhu, you would not be able to curse the skeleton currently at G11 because the skeleton next to you is closer. Warlock Curse can only be used on the closest enemy. If you shifted to say F13 or G13, then you would be able to do two things differently if you wanted; you would be close enough to curse that skeleton at G11 (which would now be an equal distance from you than the other skeleton), and you could then use one of you powers instead of a melee attack giving you a much better chance to hit.
Also if you haven't used an AP this encounter you might also consider it now, either dropping an attack (or both) toward the Bleached Skeleton (the boneshard skeleton) to help kill it off or kill both skeletons you just cursed and get the +4 to your next d20 roll. Or even use one of the pact boons to trigger your rod and curse the skeleton at G7 and keep the +2 from the other. When G7 dies you will get the extra +2 anyhow.
Just a couple suggestions, please do not take it as though I am trying to make you do what I wrote above.