That makes no sense. Just buff water heal to make it like the old one, then we don't need a water heal level 2. Late game isn't that bad, like pumu says mass V's and you'll be fine. 10 clones can probably beat down 3 giants. However it's a lot to micro and their health is low. I've said this before but increase their survivability.

I tend to survive by stalling my opponent in their base. if they manage to push out to tower i wait until they rush into my base so i can deal with poison much easier and take what i want from my opponent starting with magikills casting elec wall on themselves quickly before letting them go so that they disappear on their own along with merics if they arent seperated then go after merics with clones so that i can dispose of the possible shadows and possess them to use in conjunction with my clones to deal with the giants. At the point that i have the shadows possessed i make waters and keep them garrisoned for a just i case fail safe