As we know, grunts are good hero killer with its normal attack.
Grunt, is the best unit in the game conservatively speaking and will against all other units.
The problem is that Grunt is a conservative unit. Their attack is not range. It doesnt has auto healing like trolls. It cant hit air. Its not a spell casters.
I found grunts to be the best bargain in maps containing health fountain. Those are maps like Lost temples.
Quickly build farseer and mass grunts like crazy. Quickly creep the middle creeps near the fountain.
Now, while creeping, your grunt will heal. Due to Grunts huge HP, Grunts will heal much faster in the fountain.
Grunts normal attacks work wonder on the creeps with small armor.
So, quickly disposed of creeps with small armors first before attacking the creeps with big armors.
If you have enough grunts, you can start building trolls. That way, you can level up your Far Seer really fast.
When creeping somewhere far from the fountain, Grunts really shine. No need to lure creeps and stuff. Just attack the creeps. Grunts have cheap HP. Also, when one grunts are about to die, just move that grunts to the...