as protoss i 9pylon scout, pylon at ramp as if youre gate expanding vs zerg, then if i dont scout before its time to build gateway, i will start the wall off and play as if its a zerg, if i scout in time and its P/T ill build gateway not at ramp, if its zerg and he isnt early pool ill nexus first and delayed forge (can be a little risky, might wanna like 16pylon 17 forge, depends how good your chrisis managment is, if you wanna be really safe, get forge on high ground then 16pylon low ground.
against P/T you can play standard.
in terms of scouting for proxy, against P 9 scout on 2 player map is sufficient to get there in time and know theres nothing at home = cheesing you, on 4 player map scout the obvious spots (shak is easy spot - most other maps just middle of map) same as vs T
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