Everytime when i try to block of crucial lanes to stop enemies retaking it just creates a small little pit on site like how does this ult work
You have to actually be on top of rafters to ult rafters properly. Here's how I'd probably do it: https://streamable.com/q6zwsm
You're gonna wanna have your wall up when you do this ult to protect you from CT, otherwise you should be fine. I do this ult all the time 👍
This is true for the most part. Sometimes you want to ult rafters but usually you would just be ulting CT something like this (or alternatively from Nest if you wanna give yourself a bit of room up there): https://streamable.com/a4xmff
As for B, I like to do the ult from on top the box: https://streamable.com/9ebvrb
This ult's also pretty good (would look something like this although I might've beefed it a little: https://streamable.com/rjg6um) but I don't use it too often because it's mainly to play passive postplants and you don't really get those in low elo 🥲
Yeah, that's the thing... I don't know that attacking pit because I never use it. As for defense I usually start the round with a pit kind of like this if I have it online and want to use it on A: https://streamable.com/1pozhr