A good old SvoeMesto and a nemesis tube and a Panzer Black Hawk 1.2 ohms 26g Kanthal.
Yeah I came late into the game, I started Vaping July of 2015 and didn't get into Mech's until around the first part of 2016. Hell my first Mech was the Noisy Cricket, but had enough sense to thoroughly research and had been building for a few months before taking the leap. Anyway I'll pop a Tootie Puffer on one of my tubes every now and again with around 1Ω build, damn good vape. I really do count myself lucky at starting late because there was a lot more knowledge available.
Anyway back to the point of Venting, I've only Vented twice which was due to faulty inline Voltage checker and other a shitty Clone. Yah hear a small "pop", a bit of a hiss. Just unscrew the Atty or pop the battery door and flip the batteries out. If it's a thermal runaway it'll get to hot to touch right away, then you toss the Mod. Just tossing the Mod with only a Vent to me guarantees a thermal runaway.
Anyway I don't stress it for I religiously check my batteries, take care of my batteries, don't abuse them and don't build stupid low on a single battery Mod.