Hello, how do you do the border blob strategy?
What is the order of policies? Should I go tradition first? or authority? thanks!
So there are various "pieces" of the border blob strat. You can decide how committed you want to go down the strategy by picking more or less of the pieces. The basic idea is to milk as many bonus on expanding your borders as possible.
Civ: Russia, russia tends to play Wide and gets innate science bonuses when territory expands.
Pantheon: God of the Expanse (again more bonuses for border expansion).
Policies: Tradition 2 (the artist policy, that greatly expands border speed) + Authority 2 (tribute - that gives you bonuses for expanding territory). The order depends on your initial plans. For more peaceful, I find Tradition gives a very solid platform. However for a more aggressive start (especially if barbs are frequent in your area) than Authority will generate quick culture boosts, and you can use tribute on CS more aggressively. From there I generally move towards more authority, mainly because you are likely to be more aggressive in the mid to late game (see below).
Fealty is a good followup follow-up tree, as you can get the policy that increases your border speed when you have WLTKD.
Religion: Cathedrals give gold on border expansion. To the glory of god is nice to enable GP buying due to your lack of tree finishers.
Wonders: Ankor Wat for even more border speed.
Great Works: One sneaky thing to do with border blobs is push more of your works into your satellite cities when you can. This culture won't help your capital expand much, but it can greatly accelerate satelite border expansion. In fact, playing border blobs is the one time I consider not putting guilds in my capital...just so I can have all of these culture generators in satelite cities.
Expansion: WIIIIIIDE! You really want to spread out your cities and get as much territory as possible. Remember with border blobs, the base yields aren't as important. I would much rather have a decent city with very open borders than a strong one that's pressed against a CS or enemy city and can't expand its borders. Island cities are also much more attractive with the blobs, they actually become solid yield producers.
Strategy wise, border blobs tends to be a fast peaking strategy. You get lots of bonuses early in the game during initial expansions. Its also a great strategy for "New World" type plays. Normally on those maps when you are doing more mid and late game expansions, it can be questionable how well those cities pay off. However, with border blobs expanding into that virgin land can unlock incredible bonuses.
The weakness of border blobs is it really falls off a cliff in the late game once expansion is done and borders have solidified. In fact if your not prepared for it, it can really catch you with your pants down (for example when I have done the strat poorly I have gone from more money than god to being in such incredible debt that I had to cancel the game....because suddenly all of my gold income from borders collapsed). So with that in mind, in general the end game of border blobs on competitive difficulties in usually a strong war. Backed by an incredible economy, you can generate a massive war engine to conquer enough to then generate the yields you need more passively). Such late game warfare is not always needed, it depends on how far ahead you are. For example if you are top of the charts but only "by a little", I would not count on being able to hold that position passively, once your blobs run dry the AI will catch up in short order. However, if you are "dominating"...than you will probably just fall down to "comfortably ahead", and can ride out your windfall to a solid victory.