if you're more concerned about AC than 'to hit' then make Int your "better" score.
(i.e. if you started with 16, 16, 12, 12, 10, 8 instead of giving your human +2 to wis, give it +2 to Int). This will give you a comparative +1 to AC and to stalker-specific effects in your powers. Of course, the expense is at a -1 to hit and other wis-based effects (compared to if you were to give the extra ability points to wisdom).
(i.e. if you started with 16, 16, 12, 12, 10, 8 instead of giving your human +2 to wis, give it +2 to Int). This will give you a comparative +1 to AC and to stalker-specific effects in your powers. Of course, the expense is at a -1 to hit and other wis-based effects (compared to if you were to give the extra ability points to wisdom).