If versatility has taught me anything it’s that more defense + base toolkit can make a massive difference. So I figured I would post all of the endurance conduits so we can have a good discussion on who wins and who gets shafted in shadowlands. And, spoiler alert - enh shaman still get shafted 
Demon Hunter
Fel Defender - Cooldown of Blur is reduced by 10 seconds, max of 20 seconds.
Shattered Restoration - Healing of spheres increased by 10%, max of 25%
Viscous Ink - Passive magic damage taken decreased by an extra 8%, max of 15%
Death Knight
Hardened Bones - While lichborne is active take 5% less dmg max of 15%
Insatiable Appetite - Minimum healing of death strike increased by 1% max of 8% (total of 13% hp heal minimum)
Reinforced Shell - Anti magic zone radius increased by 15% and duration increased by 1 sec max of 8 secs
Druid
Tough as Bark - Barkskin cd reduced by 10%, max of 24%
Ursine Vigor - for 4 secs after shifting into bear form, armor and hp increased by 12%, max of 28.8%
Innate Resolve - Regrowth and Frenzied regeneration healing increased by 12% max of 28.8% when used on yourself.
Hunter
Tortollan resolve - Aspect of the turtle cd reduced by 10 sec, max of 32 secs
Marksman Advantage - Hunters mark makes target do 3% reduced dmg to you, max of 10%
Rejuvenating Wind - Exhileration heals you for an additional 10% of your max health when used over 8 secs, max of 30%
Resilience of Hunter - Feign death reduces dmg taken by 3% for 8 secs, max of 10%
Mage
Cyro-Freeze - When iceblock is used heal for 20% of your max health, max of 50%
Diverted Energy - Your barriers heal you for 20% of the dmg taken, max of 60%
Tempest barrier - Blinking applies an absorb for 5% of your health max of 15% for 15 secs
Monk
Fortifying Ingredients - Fortifying brew gives absorb shield equal to 5% max health, max of 20% for 15 secs
Grounding Breath - Casting vivify on yourself increases healing by 10% max of 25% and has chance to refund the cost
Hard Denial - Expel harm healing increased by 20%, max of 35%
Paladin
Divine Call - Divine shield cd reduced by 5 secs when hit, 30 sec internal cd, max of 15 sec internal cd
Golden Path - Consecration heals you for 2 x 5% of your attack power every second while standing in it, max of 4.8 x 5% of atk power
Shielding Wards - Word of glory applies a shield on the paladin for 15% of healing done, max of 30% for 10 secs
Priest
Charitable Soul - Casting divine shield on someone also applies a shield on yourself equal to 10% of the amount, max of 25% for 10 secs
Lights Inspiration - Desperate Prayer heals you for an additional 5%, max of 20% over 5 secs
Translucent Mage - Dmg taken reduced by 5% after using fade for the first 5 secs, max of 15%
Rogue
Cloaked in shadows - Entering stealth applies a bubble absorbing 10% of max health, max of 24%, being reduced by 2% each second while out of stealth.
Nimble Fingers - Energy cost of Feint and Crimson Vial reduced by 5, max of 20
Recuperator - Slice and dice heals you for 18% of max health over 36 secs (didn’t see higher ranks)
Shaman
Astral Protection - Reincarnation cd reduced by 3 mins and instantly casts astral projection, max of 10 mins
Refreshing waters - Healing Surge healing increased by 15% on yourself, max of 30%
Vital Accretion - Earth elemental increases your max health by 20%, max of 40%
Warlock
Accrued Vitality - Life drain heals for 44% of amount drained over 10 secs, max of 100%
Diabolic Bloodstone - Anyone that uses your health stone grants you 5% leach for 8 secs, max of 12%
Resolute Barrier - Any attack received that is less than 5% of your max hp reduced cd of Unending resolve by 10 secs. Internal cd of 30 secs, max of 16 secs
Warrior
Iron Maiden - Slam has a 4% chance to refund a charge of shield block, max of 10%
Indelible Victory - Victory rush / Impending victory heal for 4x the dmg it dealt over 8 secs, max of 8x the dmg.
Stalwart Guardian - Cd of Die by the Sword and Enraged Regeneration reduced by 20 secs, max of 50 secs.