US Immigration Attorney — O-1A Visa for Startup Founder

I'm a startup founder seeking an experienced US immigration attorney (or firm) to prepare and file an O-1A petition. Looking to file within the next 4–6 weeks for a September entry. Quick profile: founder of a venture-backed company (seed round in progress, lead investor committed), with a prior company I scaled to market leader across 11 markets plus national press coverage. Co-founder is a US citizen; I'm a Slovenian national, currently in the UK. What I need: Full O-1A petition prep and filing, with premium processing Honest assessment of my case strength before filing — I'd rather delay and strengthen evidence than file a marginal case Guidance on consular processing (likely Ljubljana or London) A clear sense of how my profile maps to the criteria and where the gaps are Please include in your proposal: How many O-1A founder cases you've filed, and your approval rate Your read on which of the 8 criteria I'd most credibly meet, given the above Flat fee vs. hourly, what's included (incl. government/premium-processing fees), and billing terms Realistic timeline to file