It was a joke :p. It's actually hard to do it because you do need CFs. Generally someones going to decline CFing you, then it wont work.
As for last age, it was actually easier now with scientists. With no peasants/builds you wouldnt generate any so the bigger you get the more your science deflated. Once you maxed scientists you'd always have the bonus which helps protect your honor. I recall a point where we gave relations and some guys ended up losing a bunch to ops.
Also, the more land you have, the easier it is. More defense helps loads.
The reason war kingdoms didnt get higher was most likely because anon destroys honor.
I agree on the activity part. Activity isn't relevant unless it is needed. Being there for waves is more important than being on for 16 hours a day. Altho, I do prefer a good mix, as it creates a good social atmosphere as well. What I like most is the bogus we have on whatsapp, some of the banter is totally hilarious (too bad it'll get me banned if I post chatlogs or pics here)