It really depends on what you want. For Lothlorien, I usually go for 2x Production on castle maps, since you can build two Border Guardhouses in your base, and with their level 3-4 upgrades, you'll have all the CP you'll ever need. If I get Corrupted Theoden for Rohan, I upgrade a farm next to my base with 2x Production and then use Cruel Taxes on it. Otherwise, I've recently started to use Pantry --> Production more, as it gives enough CP in the long run, costs less than Production --> Pantry (600 vs. 750) and gives you better economy. I rarely get Defence for my resource buildings. Usually when I do, it's on an RB close to the enemy base, and I get Production --> Defence for some economy and arrow defences (2x Defence just takes too long to upgrade).