Firstly, the skills are upgrades to the voidwalker supercharge ability "nova bomb" and act as follows: Vortex: Creates a continuous orb which damages any enemies in its radius. Shatter: Nova bomb splits into three projectiles covering a wider area. Lance: Nova bomb is no longer effected by gravity and travels much faster. Note these are not word for word their in game descriptions and are instead paraphrased to include more detail and because I'm lazy and don't feel like looking them up to copy the exact text : I'm just curious about opinions on what everyone prefers. Personally I used shatter for a while and only later decided lance was more useful in more situations. What do you prefer if you play as a warlock? If you dont, what supercharge upgrade do you like for your class?