Help with levelling past 91 on my Warrior

I'm about half way to level 92.

I'm running Warbringer Earthshatter, so pretty much one of the least popular builds... and it is really fun to play,

There are many mods I CANT run : Extra Lightning / 400% Critical Chance / Damage Penetrate Resistances / etc.

This makes it much harder to sustain maps : I'll often find a rare T15 map that has insanely dangerous mods and the odds are I will lose 10% XP instead of gaining 3-5%.

It seems I need to run maps that are both CORRUPTED and IRRADIATED to get level 82, then the XP is still OK.

I am mostly slotting Precursor tablets with "Increased Quantity of Waystones" and try to overlap them to increase the odds.

Needless to say I am not running Rituals which are often deadly on warrior due to being stuck/body blocked/stunned.

I can't really run breaches either my build doesn't "clear the screen" it clears about half the screen when I blow up the spikes with Warcries.

Come to think of it should I use the Delirium drops that I have and inject them in Waystones?

Does a boss add substantial XP to completion of a map?

What's vague for me is exactly what mechanics boost XP or the mob density that result in more XP.

Do rares with MORE modifiers on them reward more XP?