Originally posted by Q99
I think some people overestimate how much power increases. If you get immunity to someone else's attack at, say, 2 mil difference, then you don't have to have lots of multiplication, and by the end of Z none of the main cast is necessarily even 2-3x as strong as Frieza Saga Goku. All that's needed for the fights to go as they do is 'strong enough to vastly overpower the foe,' which doesn't need to translate into huge percentage change.
Sort of.
It's more like you need to be "x%" stronger to ignore attacks. But even that doesn't hold true.
But, yeah, your very last statement is exactly what I've stated numerous times as to Toriyama's logic.
Originally posted by Q99
(Also, people definitely underestimate how big and tough stuff in space is. If a blast can one-shot the Earth, a blast a hundred times as powerful is doing squat to Jupiter, for example, and in turn the Sun wouldn't notice attacks a hundred times as strong as what's needed to blow up Jupiter, and so on. Of course, planets and moons in DB in general seem to be extremely fragile. None of the non-planet/moon destroying attacks show so much as a thousanth of a percent of the needed destructive power to blow on a planet. Earth is Really Tough).
My power scaling worked as follows:
Roshi around a power level of 100 could destroy the moon and had plenty of energy to spare after he was done.
150,000,000 power-level for SSJ goku: the weakest adult SSJ form we saw.
150,000,000/100=1,500,000 times more powerful than that form of Roshi.
So Goku SHOULD have been able to (Ki is a direct measure of "spirit energy"
destroy a solid object roughly 1,500,000 more massive than the moon (assuming the same density...but doesn't take into considering that an object of sufficient mass at a certain density will collapse in on itself and form a neutron star or a black hole...but bare with me as we scale.)
That would be 2,605,500,000 KM radius assuming the same average density as the moon (using the average radius of the moon.)
If we include the distance of Pluto, the total distance from the center of the sun is 5,900,000,000 KM. Remove pluto and that distance becomes 4,496,000,000 KM. (Because Pluto is no longer a planet.)
So we end up with a blast that should be a bit above casual, being able to destroy an object who's density being equivalent to the very dense moon's equal to being a 2.61 billion mile radius. That's a MASSIVE object. That's being able to destroy an object a bit over half the size of our "modeled" solar system (excluding things like the Oort Cloud).
That's absurdly huge. If we go by my other estimates of a 20-50 times jump at each powerup in the SSJ category, we end up with very very large destruction.
I'll calculate it out for low end and high end:
2,605,500,000 * 20 (complete SSJ) * 20 (ASSJ) * 20 (FPSSJ) * 20 (SSJ2) * 20 (SSJ3) = 2,605,500,000 * 20^5 = 8,337,600,000,000,000 km
A lightyear is 9.46 trillion km or, in expanded form 9,460,000,000 km.
The Milkyway galaxy is about 100,000 lightyears across. To find how many km that is, 100,000 * 9,460,000,000 = 946,000,000,000,000 km
To see how many galaxies the size of milkyway a blast should be destroying, divide our low-end estimate of our scaled moon-sized object being destroyed by the size of our Milkyway in km
8,337,600,000,000,000/946,000,000,000,000 = 8.81
That means that SSJ3 Goku should be destroying 8.81 galaxies, no problem. That makes sense since his Ki Energy was felt across the entire universe, all the way on the other side. However, the scaling isn't to be so...
That also means that it is not far fetched (If much FTL is applied) to have Broly destroying one galaxy at a time, but that also means that he is stronger than SSJ2, but not nearly as strong as SSJ3 (which means that I would have to concede to Kento our argument we had about 2 years back...but it doesn't apply due to the other things we discussed.)
To redo the whole thing with the high end estimate of 50:
2,605,500,000 * 50^5 = 814,218,750,000,000,000 km.
814218750000000000/946,000,000,000,000 = 860.7 Sized Milkyway galaxies in one above average attack.
So when I said a casual blast should be able destroy whole portions of a galaxy, when deflected or dodged, I was serious. This is why there is lots of power-scaling issues with DB. It got ****ed up along the way. Toriyama tried to "retcon" I believe when he introduced that Majin Buu energy requirements with his statement about how much energy it took to destroy a planet...but that takes a crap all over all sorts of logic, namely, Roshi's blast was a bit more than 1/10th of Majin Buu's power which is plain ridiculous.
Considering to actually do that would take a much larger blast than what it would take to destroy a planet based on distance alone. Without a problem...? First of all, the blast was not centered on him, and second of all, HE WAS MISSING HALF HIS ****ING FACE. Freeza's unique physiology is all that allowed him to survive after Namek's destruction, now admittedly we do not know whether it was Namek's destruction or Goku's retaliation which wounded them, but we DO know that planetary destruction are capable of killing endgame DBZ characters. 
) has Thanos not pretty easily taken out Hulk physically? Which demonstrates physical superiority to Hulk. Oh, and he also IIRC nearly killed Silver Surfer with like seven punches.