Ah Elvi, hate to torment you (in this particular way) but there was much little numbers involved in the x-com games...
45% accuracy with a snap shot costing 12 ap, 5 ammo left in the IN clip, reloading would cost 6 ap if i take the HE clip from my belt or 9 ap if i take the AP clip from my backpack.
The sectoid fires his plasma rifle, hits me in the torso, but *gulp* my personal armour will save me for 15 damage points.
How many ap will you need to walk up to me while not getting shot yourself and administer 3 doses of pain-killers and 2 doses of medicine?
Of course we won't play this game on a grid, let's KISS*.
*KISS - Keep It Simple Silly