Jungle Nidalee builds AP, and has the highest critical strike on team, higher then Top AD Gangplank

Here's the ranked match I am referring to: http://matchhistory.na.leagueoflegends.com/en/#match-details/NA1/1769899168/214474913?tab=stats&participant=10

In the stats for red team, you can clearly see Nidalee had a Critical Strike that did 842 damage, and Gangplank had one for 709 damage

1. Maybe I'm forgetting something but, where does Nidalee have crit chance, or passively cirts?

2. If crits are 200% of AD damage you deal, then her attack that triggered the crit would have had done 421 un-critted AD damage, but she was building AP, and only has 9 AD Marks, and 21-9-0 masteries. How does she do so much AD damage still?

All together, Gangplank made 4k more gold than Nidalee, built AD and Crit, had Crit damage runes, and Gangplank's Crits apply to Parley. This didn't do more damage than a basic attack/ability Nidalee did while Nidalee built only AP, and doesn't have any Crit chance in her build, or have passive crits from her abilities.

What am I not seeing here?