Luai was announced as the Papua New Guinea NRL team's first ever signing earlier this week, and now speculation continues to grow around who his teammates will be.
Alex Johnston remains a rumoured signing, but according to veteran de Belin there should be a fellow Kumul high on the expansion side's radar.
"Lachie Lam, he could be the best signing as well because he's a gun if you watch him over in the Super League," de Belin said ahead of Parramatta's round-nine clash with the Warriors.
"I reckon he's one of the best halves I've played with. So I think he'd be a great signing.
"Every time I play with him in the Kumuls he's a gun."
Lam scored a double in his PNG debut at the 2017 World Cup. Since then he has accumulated 14 appearances for his nation and scored seven tries.
He will be eyeing off a third World Cup with the Kumuls to be hosted across Australia, New Zealand and Papua New Guinea at the end of the year.
A Sydney Roosters junior, Lam has been plying his trade with the Leigh Leopards who are coached by father Adrian in the Super League.
The 28-year-old, who is co-captain of the Leopards, has been shining in England and was their player of the season in 2025.
"He had a bit of an unfortunate circumstance coming into rugby league with the Roosters at a young age," de Belin said.
"Coming into a premier side there it took him probably a little bit longer to find his feet."
But with a little bit more maturity and experience, de Belin sees Lam as ready for an NRL return, and with his skill and the PNG connection, he would be the perfect half-back to partner the club's marquee signing.
"I think that's an awesome job getting Jarome Luai," de Belin said.
"That's a massive signing, and I think a lot of boys are going to see that now that he's done it, he's a bit of the trailblazer and I think a lot of players are going to follow him across there."
Yet the Kumul also understands the importance of nurturing local talent, with the Chiefs publicly issuing a long-term goal of having 75 per cent of the team comprised of local players in a decade.
"There's still a long way to go but you can't just have a team full of recruits from Australia because you won't be able to get enough," de Belin said.
"You're definitely going to have to bring a lot of those local juniors through and hope that you can strike gold on a few."
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