Three warheads are really expensive for a couple kills and, again, it's just overkill. The only thing I can see an ICBM used for is to hit someone very far away who has a ton of stuff in one place (not likely). Or if they have a ton of units stacked there. I use ballistic missiles on large cities with lvl 2 and higher airports. Nuclear warheads on anything but CMs are just overkill in my opinion. Besides not producing them as fast as conventionals the chemical warheads are only effective against soft targets (If they do affect armored units it's very limited). I generally stick to conventionals because they do the job and you don't get so many morale points knocked off for civilian casualties. CMs are my most commonly used delivery method because they are the most available and flexible. I try to keep my supply of warheads around 100. Tactical Missile Use: As you can see from the above, my blitz tactics call for a large supply of warheads. After that I generally go by the stuff I already wrote in the General Attack section because I am a firm believer in 'the best defense is a good offense.' Then I get my aircraft (If they weren't the closest things before and already did this) and cut the head off their attack by shooting missiles at anything that registers on radar. General Defense: If a country attacks me I round up as many of the troops I think will be effective against whatever type of troop is attacking and place them in front of the enemy. While attacking I have more mobilizing anyway so if another country suddenly declares war then I send some of my main force back to delay them while the new stuff finishes mobilizing. I don't worry too much about spreading myself too thin because when 90% of your forces are in front of the enemy they are going to have a hard time getting around them. I don't worry about the provinces that go rogue because they are easy to reclaim later and they aren't working for the main problem (the country you're at war with). Once the provinces are captured I condense my airmobiles into groups of three and take the cities.
If the entire country is within airmobile range I go for the cities last (but hit them with missiles first so that nothing can come out of them anytime soon). While I'm waiting my aircraft and one or two artillery pieces defend the city.
Usually there is a city somewhere in there and I quickly annex it and build an airfield to continue the run. I usually run my airmobiles over and the proceed to take over anything within range. I learned that while fighting Germany (they had around 40 squadrons and my airmobiles would get killed if they were in the air when the counter reached zero on the patrol). If they have an airfield nearby I make sure there are at least one or two missiles earmarked for it.
Then I get as close to the border with planes as I can to 'look over the fence.' When I have a good idea of what I will immediately encounter I declare war and shoot missiles at everything in sight. General Attack: When attacking an AI I generally build up a lot of reserve missiles/launchers, aircraft, and helo infantry. If I forgot any possible sections please tell me so we can go over them. I hope someone will go over conservative tactics because I would like to hear about them and hopefully we can improve each others tactics. I happen to be a blitz player and will go over my general blitz tactics. I would like to hear what everyone's personal tactics are (against AIs) in the following scenarios: General Attack, General Defense, Tactical Missile Use, Tactical Missile Defense, Intercontinental Invasion (you attacking them),