Originally posted by thrila
In RTR 6.0 Rome is a single faction, so i have the whole might of the Roman Army throwing itself at me. I've managed to relieve my single army with 2 full armies and transfered my leader to one of them, he's awesome at the moment, with 80+ horses with 3 silver chevrons. I just destroyed what i thought was the last of the Roman armies and 2 more have popped up! Is there no end! I've not actually attacked Rome itself but it's in sight, it's fully fortified so i may leave it and quickly gobble up some smaller cities.
Carthage have just attacked my only city in North Africa so i'm now fighting 3 factions at the moment, though the Gauls are no longer any real threat. I'm a bit miffed that Carthage attacked as they were my largest trading partner, i'm starting to make a loss each turn. It shouldn't be a problem as i have about 300k in the bank. Like you i build ecomic buildings first with exception of my first couple of cities for training troops.
My iberian campaign has been great fun so far, it was really tricky at the start being squashed between the gauls and carthage.
Here's a tactic I use against alot of factions.
I move one army up and lay siege to a city. I move a 2nd army up right next to the first one. Now, when a Roman army comes to the aid of the beleagured city, when it attacks, the city garrison can't come out as reinforcements. Most times the enemy army wont even attack. Romans are more prone to attacking in that situation, at least thats my impression.
As the Iberians, I would take no less than 4 armies down the Italian peninsula. The Romans tend to be very aggressive when it comes to defending Italy. Kick them out of Italy and they become much more docile.
Remember MacArthur? Inchon ring a bell? That works very well in RTW.

When I went on the offensive against the Greeks, I landed an army at Thermon, laid siege.....then when 3 or 4 Greek armies came a running, I moved my army back onto the fleet. I then sailed the fleet to Sparta and landed the army there. Again, I laid siege, but I only built ladders. The next turn I assaulted before the Greek hordes could get me.

After taking Sparta, I built a small garrison, then moved the main army to attack a Greek army that had a General. I couldnt force combat that turn, but the next Greek turn I got attacked by another Greek army with a 7 star general and the first Greek army was reinforcements. Greeks had close to 3000 men, I had a little over 1400 so I let my Legendary Commander fight that one on autoresolve.

PS I might have to try the Iberians, initially it should be alot like playing Carthage since you get the same basic troops. Iberian Infantry, Round Shield Cavalry and Libyan Spearmen. Battles against Roman armies can be very challenging until you get some heavy infantry units.