Three of them couldn't beat hanzo, tsunade was nearly defeated by kabuto and oro was defeated by itachi and u say they are invinsible? They don't even have an answer to sharingan genjutsu (except jiraiya), kirin, double tskuyomi and double totsuka blade. If hanzo could take them on then itachi and sasuke can do better.
ummm.... first of all hanzo is a weakling?? wait he got beated by mifune... IS MIFUNE A WEAKLING? hell no..... AND THAT HAPPENED when they not even had half of the experience they have now and techniques (kinjutsus, sage mode, souso saisei, etc etc)
Answer to sharingan genjutsu? simple, they have a mini katsuyu giving them chakra constantly waking them up from genjutsu.
Kirin?? first of all where are your storm clouds?? then we can talk about kirin. and anyways kirin can be blocked by the three great walls that oro summoned when he endured a fight with four tails naruto. and there was still one wall up.
Double Tsukuyomi?? so this means that if 1 tsukuyomi puts you in coma, the other will kill you?? THAT'S SIMPLY NOT LOGICAL...... Starting from the fact that SASUKE'S TSUKUYOMI IS NOT AS STRONG AS ITACHI'S. AND IT ONLY AFFECTS ONE PERSON AT A TIME NOT 2 OR THREE.
DOUBLE TOTSUKA BLADE?? SO YOU ARE NOW COPYING/DUPLICATING A SACRED/HOLY ITEM....... that was simply nice...
And going back to hanzo, is hanzo a weakling?? HE WAS THE LEADER OF THE RAIN VILLAGE. HE PUT NAGATO'S LEGS IN THE CONDITION THEY ARE. HE CAN USE TELEPORT JUTSU. WHERE IS THE FACT THAT MAKES YOU THINK HE'S AT LEAST WEAKER THAN ITACHI OR SASUKE? maybe not more than Itachi, but i'm sure that stronger than MS sasuke.
AND FOR THOSE THAT SAY TSUNADE IS WEAK, BECAUSE KABUTO WAS KICKING HER BUTT? first answer me this.....
*who was the one that took the food pill??
*who was the one that had to use Tsunade's hemophobia agaisn't her, because he was about to get PWNED?
*Did Tsunade summoned Katsuyu?
*Did Tsunade broke her seal and used her Genesis of Rebirth?
*How long has Tsunade been without fighting, before fighting kabuto?
ALL THIS ARE FACTS, AND FACTORS THAT INFLUENCED IN THE FIGHT OF TSUNADE VS KABUTO.