I have reviewed the replay. Since some players believe that this is not a bannable bug, I did some research and found this forum page.
viewtopic.php?f=43&t=120896&p=479154&hilit=batrider+bug#p479154Batrider rushes urn. Starting item build: 2 gauntlets + urn recipe + tango + clarity.
1:58 - Batrider finishes urn before grabbing brown boots. This was my first warning that Batrider might be attempting to abuse glitch and gain early urn charges (urn is a common item however).
5:41 - Batrider recieves his first urn charges.
6:34 - Uses urn charge to try to heal self but dies.
7:10 - Uses urn charge offensively on Undying. 1 stack of Napalm. No bug abuse. Afterwards, Timbersaw is low and Batrider uses urn to heal teammate.
8:36 - Uses urn charge offensively on Windrunner. No Napalm stack. No bug abuse. At his point, Windrunner accuses Batrider of bug abusing. However, at this time Batrider clearly has yet to abuse (in a way that would alter outcome of the game).
9:39 - Uses urn charge offensively on Doombringer and kills. 1 stack of Napalm and appears to be standard Batrider play. No bug abuse. However, it is more difficult to tell on Doombringer as his skill gives him HP regen.
11:20 - Uses urn charge to heal Timbersaw before entering a fight.
15:15 - Uses urn charge offensively on Doombringer. 1 stack of Napalm. No bug abuse.
15:30 - Uses urn to heal himself.
20:50 - Uses urn offensively against Undying. 2 stack of Napalm. Does not appear to do a significantly extra amount of damage where I would classify it as game breaking but it is a close kill that was helped by Napalm. Batrider benefitted from the slow of Napalm allowing him to get more auto attacks in.
31:03 - Uses urn charge offensively against Gryo. 2 stacks of Napalm. Does not appear to do a significantly extra amount of damage. Gryo was dead here regardless.
31:23 - Uses urn charge offensively against Doombringer. 2 stacks of Napalm. Does not appear to do a significantly extra amount of damage.
32:10 - Uses urn charge offensively against Windrunner. 1 stack of Napalm. Does not appear to do a significantly extra amount of damage.
Yet to see this 1.3k damage.
35:53 - Uses urn charge offensively against Doombringer. 2 stacks of Napalm. Does help Batrider get the kill but damage does not appear significantly extra. Uses urn to heal self afterwards.
37:15 - Batrider picks up radiance. This is interesting because my guess is Napalm would increase the damage output of radiance as well as urn. Could this be the reason for the radiance of Batrider pick up?
38:30 - Uses urn twice to heal self
39:15 - Uses urn offensively against Undying. 2 stacks of Napalm. Close kill. Napalm increased damage combined with urn + radiance might have been the difference here. Although most likely Batrider could've chased down Undying with blink. Uses urn to heal self afterwards.
39:20 - Batrider uses urn offensively against Windrunner. 1 stack of Napalm. Another close kill. Once again damage increase from Napalm combined with urn + radiance might have been the reason Windrunner dies.
41:34 - Batrider uses urn offensively against Undying twice. 1 stack of Napalm. Undying narrowly escapes.
No more time stamps are given by OP and this trend continues throughout the game. Batrider gets 1-3 stacks of Napalm on a target then uses urn throughout the entire game along with having radiance later.
The longer the game goes on, it seems more apparent that Batrider might be trying to abuse Napalm. I find it hard to imagine that Batrider was unaware that his Napalm was causing extra damage through urn considering Sitting_Duck pointed it out multiple times and the Batrider rushed urn and eventually picked up a radiance. Additionally, Batrider never sells the urn despite having enough gold to pick up much stronger items which shows me he sees a lot of value in the item even late game. Added up over the game, the extra damage from Napalm was likely large. However, I never saw Batrider insta kill anyone by stacking up many Napalms, so I am unsure whether to call this gameruining.
I feel that I am not experienced enough to give an opinion on this. I hope my post/timestamps will aid the moderators come to a decision as aRt)Y pointed out this is judged by a case to case basis. Sorry I couldn't be more help to you, but I do understand your frustration.
Edit: I neglected in my post to discuss Batrider's skill build which raises more concern. Batrider chooses to max sticky Napalm first and gets ultimate Flaming Lasso at level 8. Batrider sees the most value in Napalm of all his skills possibly due to the urn interaction.
