in order to use this strat, u have to be in 3s AT, and all of your partners must at least a moderate player to do this.
im not gonna tell u how to build cuz it's gonna take me forever to type it in so this is just the main point
i know it's the gramma is bad cuz im currently in school and only have 1 hour in between so i try to type as fast as i can.

sorry for the gramma and vocabs..

1st: go 3 mk and harash one base.. and each must have the first spell to stun (don't know what it's called cuz i only use hotkeys). At least 1 of their heroes will be nailed (stun) and killed.
2nd: 2 of you guys will need to straight tech to tanks, remember to upgrade the siege attack and def for it (Higher Attack will result in Faster game).. And another will go Straight to gryps. (i know u will ask what if they rush before we get to tier 3?....) A. Don't worried, your mk will certainly do the job at def your base, just keep harashing at their base and make sure u kill one or 2 heroes before u head back to town for heal. Most player don't know what to do once their heroes are gone, so it cans give u a couple more mins to stock up your tanks, and gryps.
3rd; once u think u have enough units (i prefer about 10 tanks for each player and 14 gryphs for the other player) then go and give them hell, then use gryphons to go to 1 of their base and go nuts, destroy their shop is a must. then mostly 3 of them will tp home and help, in some case only 2 will tp and it's ok. then the other 2 bases will be empty and vulnerble for your Tanks. I prefer the most farthest base, cuz it'll will take time for them to go buy a tp or just simply runs back to their base. Finally kill the Main hall or whatever hey had. Keep doing this for 2 more times and they will soon will leave.....
I know it's a dick move but it's fun for people who like to try out new strat like me
we can't use mortal becuase of its low hp and easy to die......Tanks has a strong def against air than mortar, so it'll be more sufficient to used when we want to just attack bases instead of fighting with unit....