Do you think after getting his ass smacked all around dressrosa he would be stupid enough to hold back? Use some damn logic.Luffy rested for 10 mins. where doffy was on wrath for all the time. LUffy used a lot of help from lot of people. Doffy was still fine after getting so much punches from G4. Doffy used god thread is a proof that he had other attacks up in the sleeves. Do you really think that a person like him knows only 5 attacks(Birdcage,parasite,hawkstrings,god thread,overheat). if fight drags for little more he will surely use other attacks too.
He could have other attacks and they just wouldn't have been useful. Also he has way more than 5 attacks anyway.
The bottom line is God thread is his strongest attack, unless proven otherwise.
This is why you underrate G4, you think Doffy is stronger than he's presented.
The Doffy wank and the G4 underestimation needs to stop.