INTRODUCTION
I was curious whether I can make a build that can facetank all three Ravagers based purely on leech as the sole defence mechanics. No shield, no kiting, no gaming skills - take everything on the face and still beat him.
PROS:
- You can facetank all Ravagers with a caster - how cool is that
- You are this one special snowflake to use drain essence as a skill
- With the farmer version you can now safely and efficiently farm SR and crucible
CONS:
- It takes around 10 minutes per Ravager
- Make whatever retaliation build to achieve better results
GRIMTOOLS:
The Ravager versions built for tankiness:
GT for Ravager of Flesh
GT for Ravager of Minds
GT for Ravager of Souls
The high damage version for SR and crucible:
GT for farming
Ravager version:
Farmer version:
MECHANICS
Skill choice
First of all, as Ravager of Souls has nasty fumble and impaired aiming pools, I decided to make a caster. Next, I wanted consistent and high damage to leech from, so my choice narrowed to channelling skills. From these, I got to drain essence as it already has built-in life leech, which can be further boosted to 26% (more is possible, but with less damage). For the second class I went with Arcanist for OA and defensive skills as well as good support for channelling skills.
Leech resistance reduction
Ravager has 90% leech resistance, and there are only a very few ways to reduce it. All but Morgonethâs set are related to vitality damage. Moreover, there are only two generic ways to reduce life leech resistance AFAIK: Haunt relic and Will of Ratosh devotion. Both giving 16% leech resistance reduction in total, so effectively we can leech 2.6 times more on Ravager.
Other leech sources
The leech from drain essence only is not enough to keep the build alive when facing Ravager. I needed moar! I took all the life leech procs from devotions (which are also vitality based) and additionally siphon souls. On top of that, there are four skills with vitality damage from gear that also have life leech. So in total, the build has 10 sources of life leech! Seems a lot, but apparently fumble affects some of them, and Ravager of Souls is the most difficult of all three (the others were killed in the very first attempt).
Defence
While the resistances are easy to overcap with potions, the biggest treat is physical damage. Thus, the build has 32% physical resistance and I tried to stack as much armor as possible. The Ward of GulâAmash also helps big time. On top of that, I use mark of torment and mirror of ereoctes. The latter is rarely needed and in the first half of the fight I never used it. However, it is good to have it when Ravager has a long hitting streak when enraged. Our 30% of cooldown reduction is also very helpful.
Offence
Rather straighforward. The damage is built by converting all aether to vitality and keeping casting speed around 200%. I also have put some points in cunning to have over 3300 OA.
SR PERFORMANCE
While in the SR boss room, the build could easily aggro the bosses, the Ravager version lacks the clear-speed in normal chunks. Thus, I made less tanky version, but with far greater damage. The change is in dropping some defensive bonuses and going to Dying God for more damage. I also changed the amulet to the one with +2 extra targets to drain essence. The result is very satisfying. The build is tanky enough for SR80+ and has a very good damage. If you are going to farm Elite or doing lower shards, feel free to swap bindings between Bat and Rattosh, so the RR is applied earlier. Monsters melt 
CRUCIBLE PERFORMANCE
Still to be tested. I do not like crucible that much, so I will be very happy for some testing. I will definitely post your results here.
THANKS
I would like to thank @Duchy for the inspiration with his AAR Spellbinder. Also many thanks to @banana_peel for pointing me to Dying God for general farming version.
CLOSING REMARKS
It was fun experiment and I definitely enjoyed the challenge. Feedback and suggestions are very welcome!
