- Mass reapers with Nitro Pack upgrade early on to apply a lot of early pressure as well as take out any expansions
- Begin transition into Marauders / Marines when Reapers begin to lose effectivness (ie. Zerg has speedlings). Also build your factory at this time
- Push out with M M M and take your expansion to begin gaining an economic advantage while you distract them with an attack
NOTE: Build orders should never stay static and are subject to change based on what your opponent is doing! Remember this is an RTS: use your brain, be adaptable, profit.