In terms of night abilities we have:
2 + 1 confusing roles; ie they confuse our enemies
1 investigative role; probably the most important role as it's one of our best bets at catching enemy mafias
1 inactive role; the ventriloquist
My suggestions are:
Killing: The ventriloquist should perform all kills from Night 3 on. However, the lawyer should perform the kill Night 2 as there will be nothing to gain from changing anybody's will that night. This could be useful on the off chance that an Escort or a Detective gets lucky night 2 and will help foil them if they repeat the same target Night 3. Players tend to like to confirm a positive finding by repeating the action the subsequent night. If they get a different result, they may be confused.
If we use the consig to discover power roles, good or evil, we can the subsequent night kill the target and alter their will to spread misinformation amongst the town and the gang. I think this should be our default strategy. If we can get onto an Investigator/ other power role and alter their will it could do very good things for our cause. Keep in mind altering a mafia's will will not fool that mafia gang, rather it will confirm the presence of a Lawyer to them, so altering wills will be most useful when used on town roles who haven't made their info public yet.
Unfortunately drug dealing will be relatively hit and miss in the beginning but it will still be fun to fuck with people's minds a bit. Imagine targeting the same player with 2 sets of drugs.
I welcome your thoughts.