On paper that could be considered the strongest crew.
However conquering the new world depends on circumstances, influence, path you take to get the top etc...
If Akainu and co just randomly formed a crew and were thrown into the seas to "conquer the new world" against the already established Yonkos, I doubt they'd succeed simply because they have more top tiers.
I completely disagree.
It wouldnt matter, this team would be be strong enough that they would destroy any other crew. Any other challenge the new world brings wouldn't be close to what the actual Yonko crews would.
YONK crews would fail against this team
but Roger Pirates would succeed:
Prime Roger stalemates Aokiji and Kizaru
Prime Rayleigh defeats Akainu high diff
Prime Scopper takes on all the Vice Admirals at once
other Roger pirates clean up the rest of the fodder marines
Akainu would solo the sweetie commandos
Kizaru and Kuzan would gangbang MOM
Garp not even required