Budapest: LePage turned silver last year into gold with a fabulous performance on the second day of the decathlon, even more so as he had a problematic hamstring.
"I went all in from this morning and it makes me really proud," said the 27-year-old. "It is nice to share this podium with him (Warner).
"This morning I pulled my hamstring before the hurdles.
"But it is decathlon, we are used to a lot of injuries, you get through it."
Duplantis enjoyed a pretty routine defence of his title, saying: "I'm really happy about all these consecutive golds.
"I don't know where this one ranks but I'm happy to keep winning.
"This was maybe the craziest atmosphere I've ever competed in so it meant a lot to be able to turn on a pole vault show for them."
Arop produced a masterful run, calmly staying at the back of the field until pushing the button down the back straight. The 24-year-old was never in trouble once he hit the front.
"Now it's going to be hard to beat a gold medal," said Sudan-born Arop, who won bronze in last year's worlds.
"I'll just have to repeat it, I guess.
"I'm going to work twice as hard now to make sure I stay on top. I don't want to be known as the guy who can only run one way."
The 4x400m relay finals round off the championships on Sunday with India outsiders for a surprise medal.
They set a new Asian record of 2:59.05 in finishing second behind the USA in their semi-final.
