Spirit of Rage exploit **minor spoilers

[Lari]

TESTED SUCCESSFULLY
with a mage level 14 (8K ldrs) and both the spirits at level 4, charges and drain at level 3. Level impossible, without any rage exp ability, for 10 minutes. I went as far as round 50, getting 3 level for reaper and 5 for lina. Tested against a "strong" (55K) enemy, went in battle with just a stack of 40 griffons, killed ranged and fast units with magic, left 12K units alive with speed 2. 16 griffons lost in the process.
The most annoying part was collecting the spheres from Lina, mostly because on my pc they tend to disappear (just graphically) from round 25. (that is also why i left after 50 rounds)

[Keneth]

It's not just your computer, animations start disappearing around round 25 for a lot of people. Quite annoying when you want those damn chargers and you can't see where they fall.

[sours]

I really hate the disappearing grind and chargers too.

It seems to only happen when using chargers. I'm guessing it has something to do with a charger landing on a unpicked up charger.

I've gone to round 70 or so multiple times using 'source of magic' for mana instead of chargers for this very reason.