Here is an effective strategy against Order I made and has worked every time so far.
Start by training 2 swordwraths and 1 archer. Tell them to go to the middle and capture&defend middle tower.
Train 3 more miners; two on gold, one on mana.
Train 1 spearton, defend middle. If middle is under attack, train additional 2 archers if possible.
Train 3 more miners; two on gold, one on mana. If still under attack, continuously send 2 swordwrath + 1 archer or 1 spearton + 1 archer to middle.
If spent correctly, the ratio of gold to mana should be somewhere around 800 to 300 by now. Train 2 additional miners, 1 for gold, another for mana. If middle is under pressure, transfer another miner from gold to mana.
By 1000g and 1000m, unlock tower spawn. DO NOT assist tower spawn. Instead, spy enemy territory using the ghost.
If middle still under pressure, create spearton + archer pairs and send to middle accordingly. No need to buy shield block.
Buy 5 additional miners, 4 for gold, 1 mana. Also, 1 castle archer.
Unless rushed, you should be close to 2000g and 1000m by now.
Unlock tower spawn II, once again, do NOT assist tower ghost. While defending the middle, unlock miner hustle and and all passive incomes.
While saving up money, train 2 giants and 1 meric. While they are training, unlock giant growth I and II.
Send giant/meric trio to middle with the preexisting spearton/archer pairs. Have at least 6 speartons and 6-8 archers. If you know enemy has magikill and/or shadowwrath, be sure to have poison cure on meric. Wait for next tower ghost, then attack with ghost. Manually control meric, making sure to stay behind spearton line and by the giants and archers. The meric is the most important piece in order to win. It is expected that the enemy have giants as well, but with the ghost spawn, you'll have the advantage. If you can see you are loosing the battle, send one of your giants back to the middle, and train an additional giant + meric along with 3 speartons and 4 archers as support. Repeat this step as needed, and you will win, even if enemy have castle archer. Be sure to continuously train more units while engaged so you always have fresh troops at the middle to send in waves. Never send any unit alone unless its the beginning ghost spawn.

Give me feedback after you've tried it or ask me more specific questions about this strategy in the comments!

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Quote from epics0UL

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Seems to work at around 1000 - 1300 I haven't tried it with higher ranking people. So it's purely experimental for higher level people.

Quote from Pandasecret

Here is an effective strategy against Order I made and has worked every time so far.
Start by training 2 swordwraths and 1 archer. Tell them to go to the middle and capture&defend middle tower.

First of, you can't possibly get 2 swords and an archer from the get-go. Sword costs 125, 2 would mean 250. Archer costs 300. Your starting gold is 500, so...
Also, what do you plan to do if you get countered?

Quote from Pandasecret

By 1000g and 1000m, unlock tower spawn. DO NOT assist tower spawn. Instead, spy enemy territory using the ghost.
If middle still under pressure, create spearton + archer pairs and send to middle accordingly. No need to buy shield block

Tower Spawn I costs 600g 200m. Why save until 1000g 1000m? If the whole strat is to get an early ghost, why wait?

And you have archers right? Use them. Assist the tower spawn. Harass your opponent. Also, why no Shield Wall? The speartons are gonna be used as tanks right? Shield Wall helps that objective.

Quote from Pandasecret

Buy 5 additional miners, 4 for gold, 1 mana. Also, 1 castle archer.
Unless rushed, you should be close to 2000g and 1000m by now.
Unlock tower spawn II, once again, do NOT assist tower ghost. While defending the middle, unlock miner hustle and and all passive incomes.

At this point, the Castle Archer is, simply put, useless. Don't buy it.

You should've got Miner Hustle earlier. At this point, Miner Hustle is next to useless.

And once again, why don't you why don't you support the Tower Spawn? You can deal damage to his economy/army.

Quote from Pandasecret

While saving up money, train 2 giants and 1 meric. While they are training, unlock giant growth I and II.
Send giant/meric trio to middle with the preexisting spearton/archer pairs. Have at least 6 speartons and 6-8 archers. If you know enemy has magikill and/or shadowwrath, be sure to have poison cure on meric. Wait for next tower ghost, then attack with ghost. Manually control meric, making sure to stay behind spearton line and by the giants and archers. The meric is the most important piece in order to win. It is expected that the enemy have giants as well, but with the ghost spawn, you'll have the advantage. If you can see you are loosing the battle, send one of your giants back to the middle, and train an additional giant + meric along with 3 speartons and 4 archers as support. Repeat this step as needed, and you will win, even if enemy have castle archer. Be sure to continuously train more units while engaged so you always have fresh troops at the middle to send in waves. Never send any unit alone unless its the beginning ghost spawn.

And if you see the enemy having a shadow, why buy a meric? It's just gonna get Shinobi'd. Counter the enemy's shadow with your own.

Instead of getting archers/spear, get a Mage or a giant.

Also, you can send archers/miners to the enemy's base to make space for your army.

Tower Spawn should be used for pressure, and also scouting; but if you want to scout, one swordwrath costs less. Pressure...it's what tower spawn is for.

EDIT: Please put all these strategies into one thread and don't name it effective; I don't mind you sharing tactics but it's not effective and your description isn't efficient.