Howdy
First, I have to ask if you are pushing your shots to the left.
It is very common for right handed shooters to push their shots to the left if they are not pulling the trigger properly. Make sure you are pulling the trigger with the fleshy part of the trigger finger directly under the fingernail. Placing the trigger in the crease below the knuckle may feel better, but that will tend to push the shots to the left for a right handed shooter.
Do you have any revolvers with adjustable sights? Is the rear sight set over to the left? That is an indication of adjusting for pushing shots to the left?
Have you had anybody else try shooting the revolver? Where is their point of impact.
I cannot recommend bending the front sight. Front sights on those revolvers are brazed on, and it is easy to break it off. I had limited success bending the front sight on an Uberti Cattleman years ago, but I made up a fixture so the force was being applied to the blade, and not to the solder joint.
One way to torque the barrel without the action wrench is to remove the cylinder and place a wooden handle in there. The hardwood handle of a hammer might work. However, be warned that if you overtoque this way you can spring the frame.
Frankly, I would make sure of my trigger technique before trying anything else.