Not sure what you mean by stack.
Soul Rip is the upgrade for Energy Drain that increases Super meter upon a kill with the Melee Ability.
The armor increase provided by The Ram is a totally separate perk.
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The ram also provides the life steal effect on energy drain. In theory they should both apply.
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No - the ram gives extra super from melee kills. The soul rip gives super from melee kills. Do they stack?
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The ram only gives extra armor, and life steal on voidwalker melee hits.
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And scholars draw. Extra super on melee kill. The point was more aimed at finding out if you get extra when both are equipped. The scholars draw and soul rip.