Yeah with Dark Pact, it took me about 30 hours played and about 14 ex of gear(which isn't as much as you think since exalts are 40c) to have shaper on deathless farm status. Granted I'm very familiar and comfortable with the shaper fight and can probably do it deathless on any type of char with decent DPS. Other perks of Dark Pact:
- Pretty much designed for the Beachhead map.
- Damage is scaled from being tankier.
- There are other variations of the build that are just as good if not better, such as the Pledge/Kaom's chest, mine(Covenant/Rippling Thoughts+MoM), Carcass Jack+1h, dual apep's, crit/non-crit, totem dark pact, skele dark pact, totem skele dark pact, probably more.
Some cons:
- Smoke phase on Chimera really really really sucks with MoM.
- Bosses that don't *hit* you are pretty annoying(such as the Plaza boss). Granted with enough DPS you can out-leech her damage even without cloaked in savagery.
- Can't really level with it at all, as you don't do enough damage to outleech the 6% health cost except on very large packs.
- Life meta to the max, so shit is expensive when you're at end game gearing phase.