The 24-year-old made his Super2 debut in mid-2014, and has four PIRTEK Enduro Cups – including the last two with Percat – and four wildcard events to his name.
"The game's changed a lot," Percat told Supercars.com.
"When myself, Chaz and McLaughlin came in, we all got podiums in our first year and we all finished close to the top 10 in the championship, or in it.
"That's no longer the case, you see people like [2018 rookie Richie] Stanaway struggling so much.
"If he can have a solid year and find himself 20th or better, that'll be a good year. I think he's got the right work ethic.
"He probably drove the car a little bit differently to me the first year in the enduros; he didn't like it quite the same way as me, but he learnt the style and started to understand what you need from the car to make them fast.
"We saw his Super2 car was a bit closer to the front and that was just him realising the level up and that you have to drive them a little bit on edge to be fast.
"Obviously the wildcards he did were really helpful, too.
"It'll be a tough year for him and a bit of a shock to the system but as long as you keep it pretty level-headed and keep a lid on it, you just tick along and do the right thing.
"I think he'll have a few rounds like Anton [De Pasquale] had, where he really starred for the rookies and had some other rounds where he was in the action."
Newcastle's 2018 finale was Blanchard's last event as a full-time driver
Percat and Jones finished seventh at Bathurst and sixth on the Gold Coast last year, after snapping a gearstick in the Sandown Enduro Cup opener.