Went into the basement, shot the surveillance station, made my way up the back staircase, taking the disguise of the tech in the stairwell. Started with Gold Coin, Emetic Poison Syringe, Silverballer, at the main gate in the signature suit (with Lockpick at a drop). Just took out the broker in Paris got a silent assassin ranking. They seem to never run out of gas and nobody cares if you're carrying around a tank that's leaking gas everywhere. Then carry the leaking tank back to where your target goes for a smoke and just leave it there. One of my favourite tricks is to find the propane tank you can carry, take it somewhere private and shoot it once to cause a leak (a second shot will explode it). If it says to use a crowbar you need to use explosives to do it remotely.
I might be wrong but I think if it says to use a screwdriver or a wrench you can usually just shoot it, so power strips, propane tanks, patio heaters etc you can shoot. Starting to realize there are many things I can just fucking shoot. The prompts on everything kinda trained me into thinking you need to do it in the "designed" way. I only recently realized you could shoot the surveillance computers. I didn't know you could shoot those power strips. Don't really get much out of these so I'm just doing it for the suits.