The Chapel Flash
When you are at a suitable point in your early-mid game, spend the troops from your first village and noble yourself to free up your chapel.
The Chapel can be rebuilt almost instantly, cheaply, and for no population cost, granting players instant Invasion faith during assaults on enemy provinces.
When I was much more active in my warring, I would send staggered noble trains at barbs in various provinces, staggering my nuke waves and hopping my chapel across the front line to cause chaos and destruction.
Basic Faking
Consistency in attacking is a strength. If a player has 25 villages in a province, and you consistently send 25 attacks from each of your offense villages it is very hard to tell which your true target is.
Pre-noble and re-noble
If you are certain you can't hold your ground, if it is too costly to try to save the village from the incoming nobles, knock the loyalty down yourself so that your enemy takes it on their first noble hit, and then time a noble after their last to take the village back. If timed well enough, you kill their invasion force and grant yourself time to recover and rebuild.
Basic Sniping
Players tend to send "noble trains" where the first attack is the strongest, followed by 3 weaker attacks, support placed in between these weak attacks are a cheap way to delay conquering efforts.
High damage, maximum yield
If you have a prideful enemy, or even just a dumb one, who will defend a village to the last, destroy the wall in an undefended village, and then tease the conquer, allowing them time to move defense in to be killed at a much faster rate per nuke. This is an excellent way to weaken not only players, but the tribes that try to support them.
You don't NEED to time everything to the second
There are groups, and opinions, which hold highly coordinated assaults as a sign of a skilled/experienced player. Not every assault needs to be timed, nukes hidden randomly in waves of fakes, and especially randomly sent sabotage waves, will exhaust your enemy as they struggle to remain as defensively strong as possible (dodging attacks/rebuilding spies)