I didn't need the health cheat. I'm surprised you said you needed it to beat the game on easy and normal.

I beat the game mostly on the strength of my rifle. First play through on medium, only had a couple of problems with a couple of maps on their final round. But on hard, I was constantly running on...

Mission 3 on hard gave me fits on the last level. I was all geared up, and running my squad that ROLLED OVER all other hard levels. That was part of the problem.

What I found to work for me is...

You need to gear up. That is, you need to upgrade your gear. I just aced mission 6 on hard with all my wranglers dead from the start because I am not max geared.

Also, upgrade your squard of...