I just had a match with some guy with a double account. Don't know who he is, but he tore me apart, even my giant spamming. However, in the course of the fight, I had one stroke of inspiration for better turtling: The fake rush.
This is a strategy to be used by the losing player, usually the one who turtled too long. During your turtle, you keep spamming miners while your opponent gets the better army and rushes your base, while your archers and walls are unable to stop their advance. However, it is possible to stall their army with just one spearton or one shadow, without using merics and with no walls.
First of all, since you are the one who is turtling, the enemy won't expect you to suddenly attack their miners.
Therefore, they won't have castle archers.
Therefore, if you can get something that is faster than their troops and tough enough to run past their troops, you get a shot at killing their miners. This will force the enemy's entire army to break off their attack and follow your single unit back to his/her base, where your unit dies a horrible death doing almost no damage at all to one single miner.
However, by then, your enemy will have broken off their attack and will have to make their way over to your base once again. By which time, you shall have another spearton or shadowrath ready to break through their army and perform the same trick all over again.
Of course, by the third time, your enemy will probably be smart enough to realize even if you manage to kill off one or two of his miners, it won't matter since your statue will be dead by the time you rush his statue.
By that time, however, you should have built up an army to rival his, and with the help of castle archers and walls, you should easily send the enemy packing.
Now, I admit that the enemy could easily ignore you and simply continue their rush on your statue while your single spearton or shadow gets killed by the massed miners who mob up on it.
However, for some reason, most people never think of that the first time they see this, and send an entire army retreating back to their base to kill one rushing spearton or shadowrath who will most likely die anyway.
Here's a replay of how I used that strategy to hold out for two more minutes on Grass Hills.
www.stickempires.com/play?replay=replay1993165&version=1.68