Hi again, troshacha! : )
Yes, you can still raise/fold with 8-10bb effective. It's if you have 7bb eff. or less when you are committed to call on a shove if you raise. You can certainly take alternative lines depending on your opponents. Sometimes, I will even shove with 13-15bb with a low pocket or KTs type of hand from CO-BTN-SB f.e. if I expect villain(s) to flat call often with these effective stack sizes or re-steal quite loose. In fifty-fifty ICM is different though and you have to consider this. I don't play them myself, but ICM behind it(used in wizard) should be accurate.
One thing to note- SnG default ranges are bad. People who have been using it for a long time know it. Don't rely on them. It's you who has to set em up in a way that seems realistic for villains tendencies. You have to go with your reads and statistics. This takes time of course, but there is plenty of it ahead of you. Post hands in the forums when you are unsure and ask a specific question posting the current HH. Because any other way, you might get the wrong idea behind our advices.
About the edge- it's a sensitive area and it depends on a lot of factors- what's out position in the tournament, are we chip leaders, who is about to act, do we have skill advantage over the rest of the field that we can use and more. Setting it to zero is not a mistake usually, but there are also cases where you have to give yourself edge and stay away from marginal situations- say you are a chip leader on the bubble, in a very good position to finish ITM and you can exploit others tightness by shoving and be a threat for their tournament life. Or it could be the opposite- you are very short on or close to the bubble with not much FE- then your edge will be < than zero.
Equilab is what you use to see the equity you have vs somebody else's range. You know this already, I am sure. But you have to keep in mind the pot odds that you are getting + the ICM tax that you pay. Say you might be getting 2:1 pot odds, but pay 10% ICM tax, so you are gonna need more than 33% to make the call profitable. Try ICM explorer - it has fifty50s filter and it's once again 60/10/10/10/10/10. You have to pay 20$ for it in order to use it fully, but I can assure you it's worth it.
Cheers!