OK so I'm just done right. now with reckoning

I have had so many attempts I have boss attempts with ricktohen and one with Sam and died and I have wasted so many gobelgums and so many attempts on this map just how just just how dose any on Beat this I'm sorry for ranting but I'm just anyone on so many levels as evrey lobby I have gotten into we got to the boss fight and failed evrey time I'm seing pepole with the calling card and wondering how the fuck can you even defeat this like ho explain to me how