We have no idea how long tobirama was fighting during that war before that last encounter and it was 20 of the strongest kumo had to offer at that time.
Stop talking as if you can gauge the power level of shinobi we have never even seen.
if kishi said they were 20 of the most elite kumo had to offer then they were indeed 20 of the most elite ninja kumo had to offer
Did you even know kumo has the strongest militar which means on a average their shinobi are stronger ?
And what would suiton in this situation do other then potentially drown the shinobi alliance ?
I'm not sure why you're getting so hostile.
I mentioned that Tobirama ended up having a somewhat anti-climactic death compared to the other Hokage that we know of, and this is why I mentioned that it actually made sense considering the circumstances in its entirety.
1. It was the Kinkaku bounty hunter force. Kinkaku and Ginkaku were absolute monsters in battle....honestly they probably would have wrecked Darui's division had the plot not called for Darui's top said phrase to MAGICALLY change just before he was drawn in. In addition, Kakuzu mentions that he has seen Kinkaku transform which could possibly indicate his presence, or the fact that someone of Kakuzu's level was around the Gold and Silver Brothers.
Considering the attitude we saw from Kinkaku and Ginkaku...they weren't going to just chill out with 18 fodder shinobi...so obviously they would only tolerate people who were going to be strong enough to be worthy of being around them. So at the LEAST we can assume it was 18 people at Darui's level and were likely higher.
2. Tobirama had to fight them after an unknown amount of time doing other things...just as you mentioned.
3. He wasn't fighting so much as distracting. Tobirama had to not only put enough effort in to keep from dying, but also to gain the attention of the Kinkaku force....and that means coralling all 20 shinobi and preventing them from branching off against his squad.
so yes...obviously his death there makes complete sense....but it isn't as "flashy" as dying fighting a tailed beast, the main antagonist at that time, and saving your son.....nor was it as flashy as dying to protect the village from two edo Hokage and Orochimaru.
Can I for sure know the complete strength of an average Kumo or even an elite Kumo shinobi...no; however, based on information we do know I can make educated assumptions.
And Obviously at this point his Suiton would be focused and directed not at the alliance, but at Obito or Madara....its not like he's retarded enough to go kill his own teammates for the sake of using a jutsu, but regardless the fact remains he is supposidly the best Suiton user, and yet he has not used a single Suiton move :/.