modern admirals are fraudulent toptiers 
they have nothing which symbolises what a toptier should be
merely changing the climate of the island aint impressive when ace can do an inferior version of that just by existing 
the only thing in canon which portrays the gateway to the toptier realm is skyspitting 
	
	
		
		
	
	
	
	
		
		
	
	
or some other insane portrayal which shows u going toe to toe with these skysplitter like oden 
	
	
		
		
	
	
 
	
	
		
		
	
	
tho i think oden might as well be capable to do a skyplit himself , we just didnt see him clash with another proper toptier 
now comes the admirals of modern era , they barely have any portrayal which puts them on the level of sky splitting
the main thing is that they dont even have conquerors haki , so they simply dont have the potential to get to that level 
the only marines portrayed to be skysplitting level are garp and sengoku in old gen 
	
	
		
		
	
	
both of them are also confirmed to possess conquerors haki
with garp directly showing advanced conquerors 
	
	
		
		
	
	
these sky splitters are on a different tier 
u can easily see that in their interaction with admirals 
lets start with old people ( characters with the portrayal of being skysplitters ) 
1. here is oldbeard defeating the strongest admiral 
	
	
		
		
	
	
2. here is rusty rayleigh stalling an admiral 
	
	
		
		
	
	
3. here is garp actually beating an admiral in every interaction 
	
	
		
		
	
	
	
	
		
		
	
	
	
	
		
		
	
	
imagine what will they do in their prime 
u also have instances where shanks simply Wi-Fi diffs greenbul 
	
	
		
		
	
	
or luffy beating kizaru the moment he uses acoc 
	
	
		
		
	
	
there are levels between them 
well end of the day , the term ' toptier ' is not a canon term in the manga 
thats why there are lists of low TT , mid TT , high TT 
i consider admirals in the mid TT range while the true toptier range starts from high TT ( sky splitters ) 
high TT is also where prime garp and sengoku should be