Word of advice: No boss fight is worth wasting over 3,000 units on
3,000 units is practically an Odin’s worth of units and the cost of a 6* nexus. No boss fight is worth that much except Abyss Collector. If you’re doing the Abyss and wasted all your stashed revives already before reaching the Collector, then spending tons of units on revives to beat him down is worth it.
But, don’t spend that much or even more for any other fight. Even the Grandmaster is not worth that much. 1k units is your goal to get the Grandmaster down, 2k max if you’re a scrub or you’re desperate. So, before you go in to a fight unprepared or underleveled, plan how many units you might end up using. If it’s too much, then quit and restart instead of wasting precious units on a fight you’re not ready for.
