It might not break , but I bet your carrier is warped. Thats WAY overkill. I usually weld about two passes from the side gears to the carrier , more like the first pic. Putting too much weld will warp the piss out of the carrier. When you bolt your ring gear back on it and try to set the backlash you will have tight spots where it has warped the flange that the ring gear bolts to. A good weld is better than a lot of weld , and heat is bad.

I've welded about 15 or so toyota thirds ,and  only 1 has broke. It was an IFS front and the guy was trying to turn it around on pavement when it broke. My