Explosive trap for ubers how best to scale damage?

So I needed a build to zerg down ubers as fast as possible and settled on explosive trap. I'm using jung's build as a template but am not entirely sure how best to scale it.

I'm using divergent explosive with ashes which gives me primarily cold damage. This will give me bigger brittles and turns on hatred for damage scaling. hatred watcher's eyes are also on the table. Crit capping should be easiest on this version and crit multi is super desireable.

I could also slot in cold to fire split the damage and try to scale both (cold to fire looks a big damage increase, but I feel like this method could be a trap?) the brittles get smaller but scorch becomes more relevant. Lastly life tap or no life tap? I currently have hatred,grace, and skitter. Life tap means I can throw in herald of ash. I can also run clarity instead and open that link up for something else.

[jung] (https://pastebin.com/mXxcCedr) build just a template the itemization will be different and I took out the cold convert stuff since it is redundant.