I leveled with Fire Trap/Searing Bond and I struggled a little bit off the start of the league when I had no gear and couldn't run Artic Armour. As soon as I got the AA running the build became very tanky. I think I lvled to 78 or so with a 3 link fire trap, it's pretty strong. When leveling, just do an average mix of damage and a little of the life nodes.