Welp,glad you like it..
Soon enough I will update it but,i just lost all my interest in udyr ever since I lost my spirit guard udyr skin,wish i'd have it again lol.

True,you do indeed deal a lot of damage,there's only one case when you need to go with your team,which is when the enemy team has a huge map awareness or they have someone that you can't solo Like a mega fed Vayne for example or if you don't have flash so you can't split push without them killing/noticing you.

Other than that,split pushing all lanes and then destroying their inhibitors in a single quick backdoor,the enemy team will have to send at least one or two to defend then that's when you've gotta start going with your team to make it a 4v5/3v5 situation depending on how many of the enemy team went to defend their lanes.

This build contains no tank items

Look,first of all you group in only 2 situations,other than that you just split 24/7
First situation is when you have 1-2 inhibs taken and your team is at either a semi bad shape or a good shape,like if they kill at least 2-3 from them then die then that's a semi bad shape,if they manage to ace without you then you have like 1 inhib,stop pushing and go help them in one team fight,focus the ADC or the mage to greatly help them then surely they will win the 4v4 situation since they already won the 4v5 one.
Second is when you soloed baron and your team is about to lose elder to the enemy team,they are surely going to contest it because they're dumb,this is where you have the decision making situation and you have to be very smart there,first you need to make sure at least one lane is pushed or your team has a nice inhibitor with nice super minions who push for you nicely so either one of them goes to defend and its a 5v4 situation then you group,or you can turn it into a 4v4 situation then go 1v1 that person if you're 100 percent and I repeat,if you are 100 percent sure you can kill him so you can have like 10 seconds to destroy both turrets then they will surely get mind ****ed and either they recall then lose like one or two teammates because they had to back ( the enemy team ) so they could defend and if they fought instead of going back then you surely by the time the elder spawned you should have the full build so you will destroy the turrets and inhib in no time.
It's always a win/win if you play it as if in it's a mind game,look at the mini map always,it's like the most important thing at this build,you shouldn't split push if you see only 2-3 of them on the map because they will be trying to ambush you if they have a tiny tiny brain and won't just let you push like that,before you split push make sure at least 4 of them are on your mini map and are fairly far away from the side/lane you're pushing so you can have your time,then it comes again xDDD
Either they send 1-2-3 or even all of them to defend so your team can get dragon/baron and cover objectives or they will fight 5v4 your team then you can freely split push which is your wet dream as RuzzleFudyr in general.

Thanks for up voting and commenting,glad I could help and if you need anything I'll be more than glad to help!