The Jags return to action following the international break high in confidence after taking eight points from their first five Premiership fixtures this season.
They will face a Dons side that have been strongly tipped to finish best of the rest behind Celtic this season after boss Derek McInnes overhauled his Pittodrie squad during the summer.
Archibald saw at first hand the fruits of his friends' labour as McInnes' men beat Motherwell at Fir Park on the second weekend of the season.
The Firhill boss reckons Aberdeen have the potential to live up to the expectations of a demanding Dons support and knows his side will have to hit top form once again as they bid for their maiden home league win of the campaign.
He said: "They are probably the best team that I have seen live to be honest. I have seen a few teams but they have been the best.
"I saw them against Motherwell and I thought they were very, very good. They have got energy and pace all over the team. Del has said that himself.
"He has brought in some right good players, he has got young lads coming through who are good players and they have got pace all over the pitch, which is probably different from Aberdeen in the past.
"I think Del was trying to stop the optimism but it is hard when you have a good start to the season.
"I was impressed with them against Motherwell and I know a couple of the players went that day and were impressed by them as well.
"It is hard to stop that. There were a couple of not bad results, but they didn't win for a couple of games.
"It is always hard when you have got a big faithful like Pittodrie because they always want success, like all fans."
Tomorrow's Firhill clash will see Archibald go head-to-head with McInnes for the first time in the dugout.
The pair struck up a close friendship during their time with Dundee United.
McInnes has made a solid start to life in the North East following a disappointing spell at Bristol City and Archibald is not surprised to see one of his closest allies starring in Scotland's top-flight again.
HE said: "He is a great lad. I learned a lot from Del. At the time he came to United, I think we all learned from him. He was a great captain and a good person as well.
"You knew he was a leader and that he was going to be a manager.
"It wasn't a surprise when he took the job at St Johnstone. He was a leader.
"As a captain, everyone respected him and the way he went about his business.
"He was a credit to himself. With the way he spoke about the game, you could tell at 34, 35, that he was thinking about being a manager.
"He began to look at games differently than a player would.
"Del is one of the guys I phoned when I got the job here on an interim basis and when I got the job as well for a bit of advice."
Thistle have attracted rave reviews for the way they have went about their business so far this season, with Archibald's free-flowing side taking the top flight by storm.
Defender Conrad Balatoni is a doubt with a thigh problem and Archibald knows his Firhill rearguard will have to be at their best tomorrow.
He said: "Anyone who has seen Aberdeen will know how tough it will be and we will be stressing that to the players.
"They have got McGinn, Hayes, Zola, Magennis, they have got players that can hurt you and a lot of options.
"They will miss Willo Flood, who is a massive signing for them, and they have brought in Barry Robson, who I think is going to be fit, as well."