Chargers Spell - Useless?

[Loopy]

In theory between it and the spell to give runes you can indefinitely regenerate mana while generating rage, spamming Chista's skill for unlimited money and easy progress towards the rage spent medal. Don't think it's worth much in terms of leveling your rage skills though, and money is mostly redundant anyway, so all it's really doing for you is the +7% crit bonus..

In practice through there are sadly way too many spells that fall into the "Nice spell but I can only cast 1 or 2 per turn and this won't be it" category.