Oh, yes.
But a large part of that is up to you. You must take in your opponent, his possible forces,the possible terrrain, the mission,etc.
Any army can be competitive. Each army has its own pluses, but then the other armies have counters for those, but they all have small weaknesses that can be exploited, etc.
Tactics, after all, is what 40k is all about.
Dont worry about how many questions youhave--we'll happily help with all of them--ALL of them. Dont be shy.
PS- This isnt your average RTS video game.
