I asked this same question a few weeks ago, not sure if its here or another forum, but I pretty much got no answer

Some people say max all the books, but thats really easier said than done. Any idea how much SP that will cost?! Besides, you really only need 2 nukes anyways, cus by the time the 2nd nuke is finished, the 1st nuke is ready to be used again. Maxing more than 2 nukes is a waste of SP IMO..
Anyways, since I got no answers, I did some research I noticed that a lot of people suggest maxing book 2. Trying to figure out why max book 2 instead of book 3 and well, I found out that at the max levels, book 2 does more damage than book 1 and 3.
Again from what I've read, for the typical '2 nukes' nuker, people seem to either suggest Fire book 2 + Light nuke maxed, or Fire book 2 + Fire book 4 maxed. Those are the strongest 2-nuke combos from what I understand. Only problem for me is that Light nuke maxed is a LOT of SP!! And Fire book 4, well you dont get that till level 70 (I think)
