There are many hard fights in Z5 some have beaten it. Those people post here and help out with the battles. Well I hope they do. Everybody who are stuck in Z5 just ask here. REMEMBER THIS IS ABOUT ZONE 5 NOT 4, 3, 2, OR 1!
WTH is hard in this fight ? Just damage damage and damage... even his '400%' dont hit for 1/3 of Your hp, so what is Your problem ? The guardian have 4k shield + 6k hp, You wont do it in 3 rounds ?...