buying op in attack

is it good

Depends on if you're playing chamber or not

depends on your agent and team
harder to get value on attack though

if u have extra money and are on escape agent/senti it's good to punish some people who overpeek
and it's very good on chamber u can just see where ur team goes and place trip on opposite site and just have full control of mid and potentially get a good amount of kills and then u can just go to your team to play easy postplant

I do it all the time just get fb and work from there it works on any agent as long as you place to the right pace

if your team plays slow yes, if they run it down it's no use