keep in mind that these are the basic 1v1 spawn points. i.e.: FFA with more players yields some not listed here.
If anyone remembers any others, please do edit/post them

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ironic-e : there are 4 near the 100 shield... one just behind the link,one just beside the shield and one each to the left and right corners of the minigun. there's a spawn near the flak in the corner of the 50s. another one is near the bio and the last one is near the 25 health above the 5 vial/ link shed.
roughinery: one near the bio, one just behind the rockets,one just behind the minigun. lastly one behind the shock and flak,but these are more rare.
rankin: one near the LG, one close to the mini and another close to the link under mini. there's another near the other link beside the elevator. one in the bio corridoor and one near the flak. bear in mind that the most common ones are the one near the mini/link, one in the bio corridoor and the one near the other link.