I took down two of these:

http://yugioh.wikia.com/wiki/Obelisk_the_Tormentor

one of which was effected by one of these

http://yugioh.wikia.com/wiki/Hardened_Armed_Dragon

using:

http://yugioh.wikia.com/wiki/Raigeki - http://yugioh.wikia.com/wiki/U.A._Stadium - http://yugioh.wikia.com/wiki/U.A._Dreadnought_Dunker - http://yugioh.wikia.com/wiki/U.A._Powered_Jersey

in that order. And i could've gone through both of them if I played - http://yugioh.wikia.com/wiki/U.A._Playmaker

and i stalled for the turns needed to play those cards by using http://yugioh.wikia.com/wiki/U.A._Goalkeeper