I did a no-aug run while at the same time maximizing praxis gain. Having become quite experienced at stealth, it actually wasn't that hard, except Fedorova. Especially since I had been selling all my weapons, ammo, and upgrades, and had no upgraded weapons, I really struggled, but eventually got her down. EMP mines helped. Barrett is actually pretty easy if you throw gas containers at him. Jaron is rediculously easy; just wait for him to jump over a wall...