"Considering he is only 22, he plays with such composure and intelligence, but I still believe he can go further," said Rudan.
"I knew he had the potential, from his previous time at the club and he is another that took control of his future, got his head down and worked hard.''
For his part Rufer was happy to extend his stint at the franchise he first joined in 2013.
"I've always had confidence in my own ability and I'm happy I've been able to express that fully this year under Mark," said Rufer.
"He has instilled the confidence I was perhaps lacking in previous seasons and believe I can now progress even further."
The 22-year-old began his career at Young Heart Manawatu before joining Central League side, Western Suburbs where he impressed enough to earn a contract with Wellington Phoenix in 2013.
Rufer, who has made 42 appearances for the Phoenix, has signed until the end of the 2019-2020 A League season.