Upgrades

Upgrades are the best way to beef up your army with comparably low cost input. They are especially important when you are maxed out. The upgrades only two disadvantages are that it is dead money until the upgrade is finished and upgrades do not serve any purpose without units who can benefit from these.

My look on the different upgrades:

versus Protoss:

- Melee Attack: not recommended, because with our ZvP playstyle the only thing that could ever benefit from it are Broodlings.

- Range Attack & Ground Carapace: highly recommended, because it makes our Roach & Hydra army extremely cost effective. If you decide to not get both of these at the same time I suggest getting the Range Attack first. The reasoning behind this: Not only is it cheaper, but it is also slightly better in general, because Protoss will go for offensive upgrades for sure and while the Ground Carapace can only compensate this partially, the Range Attack compensates better since it gives your Roaches +2 damage and your Hydras are very fast attacking and should only get hit when your Roaches are dead.

- Flyer Attack & Flyer Carapace: pretty good choices for mid to late game.

versus Terran:

versus Zerg:

In a mirror matchup having the better (faster but still save) upgrade timing often is the deciding factor. But you *have to* hit (or at least force some good trades) then, before he is even on upgrades again!