Recording a DJ SET - synching a master audio (clean recording) with multiple short tracks (iPhone)

Hey there,

I’m having a bit of a problem with the syncing options in Adobe Premiere.

Here’s the scenario:

We want to create short social media clips of a friend who is a DJ.

I have one clean, continuous audio recording of her set, directly recorded from the PA with a recorder. It has a duration of 1.5 hours.

I also have about 50 short video clips, all containing audio of different moments (and therefore different tracks) from the concert recorded with an iPhone. All of them have a short duration (50 seconds max).

What I want to do is sync the master audio (clean) with the cellphone recordings (which contain crowd cheers and a bit of atmosphere) to have a more balanced final audio—possibly having the option to weigh both tracks. Then, I want to sync this combined audio with the video.

What could be my approach here?

When I put both audio tracks in a new project, Adobe fails to sync via waveform. Essentially, I have the loud and somewhat dirty recording failing to find its position on the long, clean track. 

I was hoping that the automation of the wavelength sync would spare me the trouble of manually searching the audio of the short iphone clips on the long clean track - is this even possible? Will Adobe always fail if there are no clean recordings with somewhat similar waveforms?

How do professionals handle this? 

What would be a somewhat manageable approach for the next shows?

Thanks for your help!