"They have been the benchmark along with the Crusaders for a number of years now.
"They will throw everything at us, so I just think we need to throw more to get the win.
"We've got to out-physical them, we've got to try different variations on attack, we've got to be hungrier."
Guildford provided some much-needed sparked off the bench for the Tahs in Christchurch, scoring a try and making some telling breaks.
"I think we were waiting back too much for things to happen and against a team like the Crusaders you've got to take it to them," Guildford said.
"I managed to pick out a few of their forwards and run a few metres.
"I don't like sitting on the wing getting a cold bum."
Guildford started for the Tahs in their first five games then missed the next five before being named on the bench last week.
"I love playing for the Waratahs. I found myself playing club rugby so I was getting pretty frustrated," Guildford said.
"But to be back in the mix is good."
Guildford fears it could be his only year at the Tahs.
"I haven't had any talks yet so it looks like it could be my last year here, but I'm not entirely sure."