In arena both are meh, outside arena the bottom team with wind main (not placed that way) is quite strong.

That said if you want to try it i think is better to expose more kushina

There's no situation, literally, where wind main is more squishy than earth main with that lineup.

The lineup is the following one:

X wind main naruto sosp

Edo roshi x kushina habanero

X x x

Talents: 32144, summon: rhino, summon mystery: giant katsuyu.

Round 1:

Is wind main free to move?

Kushina mystery or roshi standard attack or clone standard attack are close to be granted to trigger a combo that will give the same 60 chakra chakra wall will give by also healing wind main by 48% of her total hp while edo roshi passive in combo with chakra coordination let kushina heal by 12% of her total hp when she use her mystery.

Is wind main not free to move?

Neither earth main is, so no chakra wall. Who gets hit are naruto and kushina and both selfheal more than enough thanks to their passives + chakra coordination if required.

On a full immune ninja healings are better than shields.

Is the enemy using madara 5ks?

Earth main do nothing as a support in this case while the combo that give up to 60 chakra gets triggered the same in wind main case and so her eventual self-healing.

Round 2: since round 2 onwards it's blatant how bigger is the support granted by wind main in this case, unless gets directly killed, but if she gets killed is almost granted the enemy move 1 is so strong that also earth main or gets killed or, if is using steel body, mean the wise enemy will go for roshi, killing him, that is even worse.