Hidden Health-bars

Okay! So Since I've been playing League, I've had this problem (And I'm sure I'm not alone) with knowing when to pull out, or go back in Pun intended Sure, I could look down at my health, but then what good is having the health-bar above the champion? I was wondering if there was a way to stack your health-bar, or the enemies above your own to show you how much health is left. It seems insignificant of course, but when I go in with my Nemesis to slay Darius, & my Health-bar covers his in a fight that's getting to the point of "really close," I'm not sure if I'm winning the battle, or losing it. In the heat of the moment when I have around forty-six health, & I'm sure I'm doing something to them since they are usually going all-out, I could quickly glance at the health-bar on the bottom of the screen, but I'm just too focused to pay that any attention, as I wan't to figure out my next plan, escape routes, prepare for a possible ganks, ect. So could it be possible during battle to arrange the health-bars in a way to indicate how much health you've left? I don't like getting surprised with "YOU HAVE BEEN SLAIN" at the end of battle, & quite frankly, if I can avoid feeding champs their Cheerios, I'll gladly get out while I still have the milk. Even if you could somehow overlay the health-bars in a simple, & understanding way as to not confuse the players, but show them with a red line in their health-bar as a comparison to their own of how much the enemy has. Anyone, tell me what you think on the matter of up close, & personal early/mid game fights with enemy champs, where their bar seems to hide under, or cover over yours.