Hint- Make sure that you either start upgrading the gryphons upgrades or the knights upgrades from the start.
My next human strat is the easiest of all but also for solo. Just get an archmage and then get a ton of footmen make sure they have they have the upgrade you get at the barracks before you fight if your opponent is night elf. Then attack them you must do this with speed or their is no way that it will work.
Hint-FAST!!!
My next strat is for when you are playing a team game when the team members are human, orc, and undead. When this is the case, the human should start by getting an archmage and footmen. While the orc gets a Far seer and some grunts. And the Undead gets dreadlord and ghouls. Rush with this attack, then the humans should get sorceress and preists. The orc should get some tauren and the undead should then go frost wyrms. If you make it to this part this strat will own but the rush must do extensive damage.
Hint-Dreadlord learn sleep to kill heroes and get second maybe third heroes to help win.(and creep)