Deathmatch is so easy, all you have to do is force your enemy to ragequit. Which is extremely easy!
Everyone who plays DM starts in Post-Industerial age-use this is your big advantage, expoilt that advantage to its fullest! Here is how you do it.
Step 1) start building houses.
Step 2) build a stable
Step 3) build a Church (but in the back of the map)
Step 4) make Hussars/Dragoons
Now this is where it gets tricky, if you feel yourself starting to lose, them move on to step five, if not then just stop with the steps, and go FTW.
Step 5) Create 25 Spies. (Delete church after you have built the spies)
Step 6) Place them in OP Stealth!
Step 7) Spread them all over the map!
Step 8) look out for the hero! (they will start plodding a long with their hero trying to find your spies) Just move your spies a round the heros line-o-sight, since your spies have an OP line-of-sight they can see farther then the hero.
Step 9) Go to facebook, or google, or forums, or go get a drink, watch TV and eat Pizza. In other words just relax! Wait for your enemy to become so angry and fustrated that they ragequit! No matter the rank, they will eventually rage-quit! Since they can not buy spies (because in you can not purchase a capital in DM IV age) they will never be able to find out where your spies are!!!!!
Step 10) Enjoy your hard earned OP victory!
Anyway that is just an extremely OP strategy for DM, pretty much the only one you need to know for DM too!
P.S. I am 100% wins in DM (The only time I don't use the Spy Strategy is in an unrated game) Other then that just call me a OP spy lamer