Battle: PPE, Conversion, vs Impressions

Hey Guys, i'm launching a Facebook campaign for a product video that can gain traction via attention, i.e. a trending product.

I want to test out my target audience with three different optimizations: PPE, Impressions, and conversions (be it website views, ad to cart, purchase, etc).

PPE ads cannot be split test, so that will have to be its own campaign.
For a conversion campaign, I can split test with Impressions vs. conversions, so I'll do that.

Does this sounds like a solid campaign guys?

My reasoning is that this way I'll be able to track the success of repeatedly shoving the ad in someone's face (impression optimized) versus letting fb optimize for website views (content views).

Of course with PPE I can't track its success in terms of website stuff like views or purchases, since no pixel is used for PPE; it's simply optimizing for likes, comments, shares within fb. This means I'll just use google analytics to find my total website views, minus my split-test campaign(impressions vs conversions), and that remaining number should be how many people reached my website due to my PPE ad, right?

I realize that was convoluted, but I would REALLY appreciate the input of you lovely folks.

BHW, forever and ever!

I have tried both ways and didn't find much difference. I am planning to try conversions again next week .
If it is a video , then maybe post engagement is a better option.

any update on this ?