Hitman....

It seems that the best strategy for a suit only silent assassin take down of The Twins is to remove the guards with dropped items and then distract the correct twin target for an unseen kill, with an easy hide of the body.

There are two places that seem to be popular for ease of accessibility in setting up that ambush. The square with the well(nefty018) and the far pier(MrFreeze2244, BernardoOne).

I opted for the far pier take down. For me this took about 5 or 6 tries. Disaster usually by throwing the remote explosives too far or distracting the wrong guards or the wrong twin being distracted with the coins. So a small annoyance(s) leading to needing a redo. It all worked out in the end.