Time based? You could always try ghostmare:
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5rg 5rg 5rg 5rg 5rg 5rg 5rg 5rg 5rg 5rg 5rg 5rg 5rg 5rk 5rk 5rk 5rk 5ro 5ro 5ru 5ru 5ru 5ru 5ru 5v1 5v1 5v1 5v1 5v1 5v1 8pt
Replace the eternities with reverse times if you don't have them.
As for the rare weapon, probably pick eternity, pulvy, or trident, since those are the rarest rare weapons.