You are using revenue tiers in the first 24 hours post-install as conversion values. What you desperately want is greater insight into the quality of users you are acquiring, retention, engagement and revenue over the longer term. This packages gets you there by combining multiple moving pieces into one offering.
Discover which early events impact long term revenue. More importantly how many of these events are required and the sequence of events.
Without using development resources, try out different conversion value schemas. Compare how much user insight you can obtain with each schema. Pick the schema with the best predictive power.
If your game has a slower monetization lifecycle, obtaining accurate D30 or higher predictions allows you to increase UA budget confidently.