I'm planning on doing a Mughals game soon, and I'm wanting to try out a little strategy to snag colonialism without too much effort.
Take the first two exploration ideas first, and get access to the uncolonized land in Siberia above Uzbek, either through access or conquest. Send a conquistador to Eastern Siberia.
No-CB one of the Siberian minors who has claims on their neighbours, and vassalize them. Use their claims to hopefully get land you can take and core. Use that land as a springboard to explore/colonize your way to Alaska. With luck you'll spawn Colonialism, but with access to Alaska you can spawn a CN there.
You have to pay for the ideas, stab, and vassalizing, but it still should mean a profit in terms of monarch points, no?