200fps to 25fps Premiere workflow. I need help here ...

Hello people of the community,

I'm currently facing a dilemma regarding the workflow of 200fps videos converted to 25fps for slow motion effects (typically gopros). I've around 100 of them.

Now, If I import my footage, interpret to 25fps, and put them on the timeline, the playback is way too choppy to enable a fluid editing workflow. 

Scenario 1

1. I import them in Premiere.

2. I can then slow them down to 12.5% (200fps => 25fps = 12.5% ratio).

It works BUT:

• the playback is choppy which slows down my edit a lot.

• When I use ramping the audio does not follow so it's not good

Scenario 2

1. I import them in Premiere.

2. I do "interpret footage" and set to 25fps

3. I export everything via media encoder so I get a clean .mp4 slow motion file.

4. I import back again in premiere to edit

It works, my edit is faster, BUT:

When I want to get to "normal speed" again, I speed the clip up 800% but then it's "not clean", I mean there are MASSIVE frame drops (frames are even scrambled...) so it's not usable. 

PLEASE, I would love to hear how you do it WITHOUT LEAVING PREMIERE. I know I could bounce them in AFX but that's complicating my workflow.

Thanks so much for your feedback