Social Media Ads Optimisation

We have an existing PPC ad campaign running in the world's largest social media platform!
The ad is targeting our ideal 'avatar' or target customer
The CTA is to sign up to receive an information brochure in exchange for an email address
The follow up action is to feed into a marketing funnel in Infusionsoft to sign up to a digital course

This is what we need right now (could be more to follow):

We want to reduce the average cost per acquisition (CPA) onto our database from our PPC Ads by at least 50% to around £0.50 to £0.80
The hourlie should be able to flex the graphics, copy and target audience & split test ads to achieve this result
We also have a variation of the offer, such as an online quiz instead of the brochure, so a split test of that would also be good to test.

This is one of 3-4 funnels we are currently working on in some shape or form, so as said more could follow as could other social media and marketing channels.

I can probably scope out the requirement a little better as we engage (please see briefing document file attached)

Thanks