Board Thread:Naruto Discussions/@comment-35448581-20150520162940/@comment-734582-20150530123954

Madez wrote: Seems dumb that a Hokage only uses 2 techniques. The two/three techniques he uses are without a doubt the most powerful combo we've ever seen (that a normal person achieved). Just like Kakashi ended any serious fight with Sharingan/Chidori, which could put a battle to an end in a second. Judging from the Minato-Tobi fight, most "Yellow Flash" battles would not have lasted more than a few seconds.

Considering the nature of the Hidden Leaf, the odds are pretty good that minato tried to add Fire Release. Though, as Hokage, he probably could've tried anything available to him. But since the Rasengan unique doesn't require seals and the Raijin is a superfast jutsu that requires the placement of markers, elemental techniques probably never were able to match the Rasengan in utility. In fact, i'd say he developed the Rasengan purely as a jutsu to work with Raijin.