How expensive to farm 86 shards in mace Windu? Tips?

Mace is a 10-energy node, so on average, 4 per day with no refreshes, 8 with 1, 12 with 2, 16 with 3. Add 1 per 3 tries on his hard node. If this sticks around until Thursday, you have 6 days, and so would need 14 on average. Doable with a bit of luck (and plenty of crystals).