What is the Eastern Orthodox view on Christs death in regards to theosis?

Yes, you're onto something and there is much, much more. We Orthodox connect Christ's incarnation, death, resurrection, and ascension. Christ became incarnate so that humanity was joined to divinity and so that he might conquer death. When He ascended, humanity entered heaven with Him. We're also uncomfortable with abstract discussions of theosis. Theology is life in Christ, not an academic discipline.