Here is the thing:
* do you want to engadge in europe
* do you want to leave europe alone
Have no advice for first case. But when choosing second plain old "Wait for Claims on Rivals" is very good, if you know what "waiting" mean:
* TRADE, TRADE, TRADE, preferably with manual merchant sending as there are some generic missions that will give you cash.
* TECH, TECH, TECH, but **only** Trade tech. As it coincidentally happened, you need Trade 7 for QFtNW, which also gives you access to all CoTs in europe (minus horde).
* Create best trade advisor, and use Free Trade slide change to gain up to 12% compete chance advisor
* MINT - one magical world and all problems with your enemies are gone (get inflation reduction advisor as second one!)
* With QFtNW explore Ceylon and annex it.
* TRADE TRADE TRADE in all CoTs but japan, china and americas (and ofc. horde CoTs are out of the reach
)
* Get conquistador to explore all inland CoTs that do not belond to horde!
* Pay friendly visits to Aztecs, Incas, etc. Get **ONE** province and gold (lots of them). (Province letter on will be used to expanding colonize reach onto whole atlantic coast!)
* Colonize all islands near iberians, brazil, NA, so other have harder time reaching new world
* Colonize st. Hellene, Fernando Po, South Africa, so they have harder time reaching india
* Repeat visits to your best friends in new world to collect your gold (from their gold mines).
Meanwhile patiently wait for Claim on Rivals. We all know that its borring, but hey fun haven't yet started
PS I'm not author of any of above tactics, there is thread on paradox forums with exquizite strategy tips for Holland, but you know how "wonderfull" search is on this site.