Reavers are really OP now. This is all you have to do:
Step 1: Buy Reavers
Step 2: Buy charge
Step 3: Buy 3 armor upgrades
Step 4: Buy Center tech
Step 5: Buy armor/damage whatever depending on your needs at the time
They are massive only so nothing has bonus damage versus them (3 base armor too!), they spawn every 6 seconds and have 500hp with high cleave.
yeah... i tried this in three different games (i have found that almost 70-90% of ppl use stalkers) and... it works ok for a while, but quickly becomes inefficient...
perhaps the stalker being "beginner friendly" is a bit misunderstood... i have seen PRO players using them, saying they are OP, i agree that they arent OP, but that its too easy to win with them...
i am not an expert player or anything, but i play often and i win about half my games, and when it comes down to it, i found that even if you play 125% and give it all you got in micro and strategy, it doesnt mean crap against someone else using a little bit of micro and using the easier units
PS: you'd think there would be an edge for using micro over easy units...