Practical Lumi Staff question

[Troxx]

I dusted off my old druid and made a push for 46 recently. The xp after hitting 46 has been phenomenal but for those druids who have continued to quad from time to time higher - how much use did you get out of lumi staff beyond 52/53? The exponential rise in mob hp I expect makes kite time jump time pretty silly with a 184dmg quad spell, but having mana free damage will undoubtedly be much faster than not.

Is it worth keeping around for consistent use?
Is consistent use worth it while quadding?
Is it worth keeping around as a supplement?
Should I just plan on embracing the afk when quadding happens later and just blast them dead faster with level appropriate spells and sell the lumi?