At Lvl 10 take whichever you prefer, Bunker Drop gives decent damage while inside, and can be used to block enemy pathing, and to escape target locking ability, such a Kael'Thas Pyroblast, whereas Combustion offers a lot of strong AoE damage in a really big circle, problem is that Blaze will be slowed while channeling and has to channel for the damage to be significant, though, even if you get interrupted or you yourself interrupt it after a split second of channeling, it'll offer 1 seconds slow, which can make a difference, ofcourse 5 seconds is better.

At Lvl 13 take Suppressive Fire against spell-damage based enemies, and Nanomachine Coating against AA based enemies. If you want to be able to have a great escape rather than dueling potential, take Fuel Leak, the long path of Oil slows a lot and can be put on fire for damage+slow with the Lvl 7 talent, Adhesive Petroleum.

At Lvl 16 take Thermal Protection if you use Jet Propulsion to engage, take Juggernaut Plating against spell-damaged enemies, and if none of the 2 mentioned talents matter, take Heat Treatment which offer a decent amount of healing when you're in the deep end.

At Lvl 1 take either Endurance Stimpack for a strong shield, or New Habits for Pyromania to be more effective.

At Lvl 13 take Suppressive Fire against spell-damage based enemies, and Nanomachine Coating against AA based enemies. If you want to be able to have a great escape rather than dueling potential, take Fuel Leak, the long path of Oil slows a lot and can be put on fire for damage+slow with the Lvl 7 talent, Adhesive Petroleum.

At Lvl 16 take Thermal Protection if you use Jet Propulsion to engage, take Juggernaut Plating against spell-damaged enemies, and if none of the 2 mentioned talents matter, take Heat Treatment which offer a decent amount of healing when you're in the deep end, it has to be mentioned, if you took New Habits at Lvl 1, Heat Treatment will be a slightly strong talent and can outshine the other talents, especially if playing with an Alexstrazsa who took so her AoE healing drops a healing globe quest.

At Lvl 20 take whichever you prefer, they're both damage/slow options, one focused on your AutoAttacks, the other around your bunker, but neither give more health or defense.