The Darcy-Jackson combination has been under a spotlight since the Melbourne premiership player joined Fremantle at the end of 2022.
It is a set-up the Dockers appear likely to stick to, with Darcy (2030) and Jackson (2029) on long-term contracts.
Injuries for both have limited them to playing just two games together this season, in losses to St Kilda and Collingwood over the past fortnight.
Fremantle picked their tallest line-up of the year in the 14-point defeat to the Magpies, with key forwards Treacy, Jye Amiss and Patrick Voss all featuring in attack.
But they couldn't convert a huge advantage in forward entries into a winning score, slipping to a 4-5 record ahead of a difficult interstate assignment against GWS on Saturday.
While Darcy is in doubt to play against the Giants after being substituted out of the Collingwood game with a knee injury, Treacy has backed the tall structure to deliver the goods as the Dockers chase a finals berth.
"I think it is very beneficial, and it allows us to stay taller in our forward line, which is what we want," Treacy said.
"Personally, what I like is when we're a bit taller in the forward line.
"I think it's a really good dynamic for us because they (Darcy and Jackson) are two guns of our team that we really like to have in there.
"I certainly prefer to play two genuine rucks and have three tall forwards as well."
Darcy had a delayed start to the season after knee and ankle surgery but managed five consecutive appearances before he was subbed out against Collingwood.
"Clearly frustrated, but he's in really good spirits," Treacy said.
"I believe he's every chance to travel to Sydney with us and play (against GWS)."
Treacy said the Dockers' forwards and teammates further up the ground shouldered a collective blame for last round's front-half failures.
"We've spoken a lot about our connection and how we can tidy that up a little bit and get a bit more bang for buck," Treacy said.
"Plus-30 inside-50s is a big differential and certainly one that we want in our favour, but we can use that better to our advantage.Â
"We need to be in the right spot, and we need the kick to be in the right spot."
