The Celts

The Celts

The Celts have the best siege in the whole game, making them the third
best civ when used correctly. Everything has more hit points and fires
20% faster, meaning in an onager battle, your onagers will fire first,
kill theirs, but if yours do get hit, they will survive thanks to the
hit points. All you need now is enough scorpions to make sure your
onagers won't be killed by any non-siege. 40 will usually do, but I
prefer an over kill amount, but 50-60 will also help. Now all you need
is a few trebs for buildings and you've got an unbeatable army (most
people won't allow the Turks to be played, nor the Koreans, but the
Celts are alright).

This being said, the Celts Woad Raider pretty much sucks compared to
most units. It's speed is the only thing that salvages any dignity, but
there are much better units that do the job. The Celts Paladin sucks
due to an insufficient tech tree, so do the Celts archers. This means
you will primarily be going for Halberdiers, after all, the only
possible thing the enemy can use to stop your siege is a massive amount
of cavalry, but the scorpions will eat that alive. With the halbs, it
won't even be a contest. As long as you have something delaying the
enemy from hitting the siege for a few seconds (while the siege hits
back), you've got nothing to worry about. Even villagers protecting the
siege will work, believe it or not.

As I've said, the Celts use siege and Halberdiers, so wood is your
worry, and it's a big one. You'll want about 40 villagers on wood,
don't worry about food, as the Halberdiers don't use much. Put 10
villagers on it if you'd like though. Other than that, trade some food
in for gold.