Depends on Tier I would say. Not because of the costs (you said they are low anyway) but because of the time tiering it. And as people say: this is an emergency fap. So the more tiers the better because due to high lvl requirements only players with high HP will take it anyway. And you dont want to use it that often (because then you should have taken mod2600) so hard to tier these days. I think a combination of Adj. Restoration chip + UR175 is just as strong as Mod2600. Sometimes better, someti