I'm used to playing as Terran so I have decided to play as Random. (I know you a can't have a said strategy that is going to be effective all the time because you need to scout and counter accordingly. I'm mainly making this post as a self note but other peoples effective protoss tech routes are welcome too.) Route #1 Chargelots Dark Templar Route #2 Gateway Units Rush Colossi w/ Thermo Lance (~4) Immortals (~4) Dark Templar Route #3 Units Carriers Mothership (Cloak and Vortex ftw) Route #4 Lots of Stalkers Colossi (~4 or 5) Few Centuries (and maybe a few immortals) EXPAND!
Route #3 is a bit farfetched... no one is going to let you tech up to carriers AND a mothership. the fact of producing those 2 units is really gas heavy, meaing that only lets you make zealots and stalkers, which is pretty weak against any timing push. Route #1 is good, I use that one myself, except you are weak against air units and cloaked units. Route #2 you NEED two bases at least, yet still a strong build. my suggestion: 3 gate stargate, go zealots and void rays, build a pylon at the lower ground of your opponents base, and warp up top with vision of your void rays. 3 gate stargate go zealots and stalkers and phoenix, lift all your opponents important units (sentries, marauders, roaches, queens, immortals, etc...) 3 gate expand, once expansion is quickly 3/4 saturated, drop 3 more gateways, and push with zealot, stalker and a lot of sentries. these are the strongest ones I know that are pretty easy to execute, there are some better ones, but are harder to perform, such as 3 gate twilight into blink stalkers, you need really good blink micro to make it effective.