I7 3770k. 4.9GHz @ 1.32v is 74°C on my kraken x61, fans set for silent mode. Prime95 v26.6 small fft.
You are pretty much topped out by voltage, you really do not want to push higher than 1.4v vcore for general use. This leaves you 2 options since you are where you are at. Downclock or fix the OC. If you are positive you can go higher, then it's not the temp that's the issue, but other things, such as LLC, current maximums, eco settings, turbo, hibernation, PLL, phases, system agent, VCCIO, something isn't set right.
Personally, I'd spend some time over at Asus ROG forums going through the bios files of what some of those guys are setting, trying, pointing at. Granted some of the names will be different, it's MSI vrs Asus bios, but the actual mechanics are the same. I could only get 4.7GHz stable at 1.32v as I had PLL set for 1.9v, which some recommended, then I read further and a poster said to undervolt from default 1.8v to 1.7v instead of overvolt to 1.9v. I tried that, and 'bing!' 4.9GHz stable at same voltage.
There's a lot more to extreme OC other than bumping vcore and LLC. Msi boards can control phase usage, it's an eco setting normally set for auto. Both need to be disabled. You want all voltage phases working 100% of the time, not dropping with cpu fluctuations in % usage. Creates instability. Etc etc etc...
If you can get vcore down, keep current to @110-120% max, you'll drop your temps.