Thread:FoodforThoughts/@comment-29219324-20160831165002/@comment-29219324-20160902115115

It's quite simple, If certain unit has high BB modifier (including consecutive damage), self spark buff or self critical buff (passive) then it's certainly classified as nuker. Frankly speaking, it depends on their kit itself, nuker tend to do selfish buff like Nyami, Rize, Voldoga, Gildorf, Melina, etc. Avant and Eze is somewhat exceptional as their kit is not entirely selfish like most of nukers.

Also Rengaku is classified as nuker, even though his buff is suitable to support rather than nuke.

Single enemy sparking is doesn't matter, that's why spark blanket (or spark helper) exist to serve more damage during sparking. It really depend on your current squad rosters, if you have Felice or other unit with relatively high combo, you are safe to put some spark sphere (or nuke sphere) to your spark helper. But, if you only have either Elza or Felice, I assume it would be great if you put survivability sphere instead. Because put nuke sphere to your single spark blanket won't achieve their peak potential anyway. For instance, Elza has 42 hit combo, but if you're not paired her with other spark blanket, then her spark potential will stuck around 50% at best, because it's impossible to do sparking without another pair of spark helper. Which means it's kinda waste to put Sacred Axe with 150% bonus damage when sparking, but by far only triggered around 50% because the rest of your squad wasn't that good at sparking.

So far, Felice and Elza is the best spark blanket in the game, because their animation is fast enough to pair with fast attacking unit like Mifune and end quite late (paired-up well with slow animation like Sirius, Ensa, Magress, etc). Another one of the best spark blanket is Sakura Miku, but to bad she was a limited unit. xD