I agree with Madara since he seems to literally be a fusion of Hashirama and himself, however Obito I don't agree with, I think he took advantage of kamui to create his own signature fire tech, if senju dna really did enhance his chakra to such monstrous levels, he wouldn't need to use kamui to generate such huge flames. He should just use them automatically like Maddy.
How does using kamui to change the shape of your jutsu increase its size? Obito uses kamui to change the way his katon functions, like sasuke/madara & their dragons. But his katon is still the same size as madara's kamui wouldn't change that.
Senju dna doesn't increase your chakra levels.
Hashirama cells boost immense psychical energy(Life force A.K.A. Yang)
This equates to stamina.The uses seen are displayed through obito being able to fight for days on end,not having to eat or drink,obito surviving the extraction process of the tailed beast,acting as a life support system support for old madara in conjunction with the Gedo Mazou
Remember chakra is made of the mixture of Yin & Yang.
Hashirama cells were the catalyst for a near unlimited source of psychical energy (Yang)
It was also no the works of Edo tensei
Madara was stated to be one of the most powerful shinobi of all time period before being an edo.
It was also stated that he has without a doubt the strongest and most wicked chakra ever produced by the uchiha clan.
Also a good thing to note is the edo tensei regenerates your chakra it does not give you unlimited chakra,meaning you cannot create a version of your justu that you had in life on a larger scale in edo form.
You create a justu with your chakra and the chakra used is replenished.
This still all edo users dangerous and even a certain few justu incredibly so.
I would also like to point out that the modification kabuto made never stated anything like enhancing his speed or strength OR chakra levels.
Kabuto retained the powers madara obtained throughout his entire life while bringing him back in a youthful state (Meaning he didn't suffer from the affects of being old)
Essentially bringing him back beyond his "Prime" as his prime did not feature all the abilities he has now.
Nagato while retaining his you did not come back in his "Prime" because he still suffered from the prolonged use of his legs because of his paraplegic state brought upon by Hanzo.
Who else can produce juubi sized attacks on their own? Hashirama is the only one & he needs SM in order to do so, funny thing about SM is that you need
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amounts of chakra in order to master the technique. Who is the only person we know that has a perfect SM & huge chakra levels? Hashirama.
Not only that but hashi compared his chakra levels to that of
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, to say that hashi doesnt just have an immense level of chakra is ridiculous.
So translating that to having increased time on izanagi & reduced time on KA, its safe to assume that senju dna boosts chakra levels.
I said that the Katon jutsu used the wind which came in its path. Thus, the jutsu got multiplied.
In the direction of the shockwave, The Katon jutsu is big enough compared to that of behind it. Also the direction of the katon Jutsu matters
The jutsu showed no signs of being manipulated by the wind. Assuming so is speculation.