At level 52 you could obtain a keycard once per day. One for droid challenges and one for profit mining. Each battle cost 50 energy. You could win about 25K credits or a handful of 3-4 * training droids with a chance of a multiplier. They were open for 1 hour after activated with keycard. Spending crystals for energy refreshes you could pile up a few hundred K credits by doing them. High cost, high reward, short time window.
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I'm starting to hit a point where credit income isn't enough to keep everyone to par.
Is the new event setup for credits and training droids a viable option for this? (At 20 energy, seems like an improvement, no?)