In the matter of 10 years they improved their strength drastically as in one of them could beat the absolute shit out of a high end nomu with 50% of their physical strength bare hand no haki no vibranium weapons just bare handed and feet all 6 of them (yes including Koze's father and mother) are no master's in haki but only koze and yassop could see 2 seconds into the future but only koze and Ben and luck can use red haki yassop decided he only needed pitch black haki and ryou if push comes to shove (and yes Ben and lucky and koze could use ryou) Koze also managed to master and evolve his father's fighting style and training to the point he could use the strong fist (might guy's moves) and some re-taekwondo moves easily but that wasn't it he also got a hidden grandmaster blacksmith to forge a naginata, gryphon and fire arms as well as daggers for koze the rest only got stuff like fire arms and daggers and one blade each one of the blades were comparable to the one of the 21 o wazamono blades but they were bonded to them so nobody could steal them including gryphon. They also got akatsuki cloaks for their infiltration outfits and they got the soul reaper captain cloaks for their hero costume of course koze got yamato's captain commander cloak and the rest had the second third fourth fifth and sixth
Of course they were all vibranium laced but only to a 50% capacity to koze, Ben, yassop and lucky otherwise fighting wouldnt be fun for them but for Koze's mother and father they were set to 100% at all times he didn't want them dying on them otherwise koze would go on a rampage and destroy the world so that was for the best at this time koze also created space x and had over 100 trillion in his bank having this much money he decided to get rid of poverty and was gaven a Nobel prize in fact a one of a kind one the Kings prize. Everyone in the world knew of this 15 year old but his face stayed anonymous they only had his picture of when he graduated from university at 5yrs old and his feets but the villiains and yakuza couldn't do anything about it because of koze also bieng the unofficial King of the underworld. Heck koze could probably buy Asia with the money he has but that's all for the catch up for the time skip but also Koze just looks like marine Ford shanks but younger as for luck rouge he's jacked like Arnold from terminator and yassop and Ben are handsome enough to be on the front of GQ covers and Koze's parents are living their best life. That's all that happened in the timeskip