In Warhammer 40k, there are certain concepts that nearly every competitive list needs to implement in order to compete. Now, I originally wrote this back in 5th edition in preparation for an ‘Ard Boyz tournament in a discussion about Warhammer 40k general army building strategy. However, while the power lists may have changed, the core concepts behind them have not changed. [Any comments about the changes between editions will be in brackets such as this.]