Killing Fontaine
I have two good tactics to kill Fontaine easily.
1:
Take two wrench jockeys, add one part bloodlust, mix in a couple spootboosts, and add electric flesh to taste.
You end up as an unstoppable wrench maniac who can charge at Fontaine and then beat the ever living hell out of him. While regaining so much health each hit that you dont have to dodge his attacks... or even use health packs.
2:
Shoot at him while running in circles around him but take care of your distance. You will only get hit like 1-2 times in the whole fight if you do well.