[Yumyums Inmahtumtums]

I had no ring on red until level 57. Taper enchantment works well in most scenarios barring caster mobs or mobs parked near caster mobs (your charm will be below some junk buff the have in themselves).

Invis works great too but it does take a sec to cast and of course you have to constantly reload spells (which you probably do anyways).

Basically, I've lost a non-zero amount of xp to not having a ring but it's nowhere near 8k worth. You can easily make the other methods work, you just need to practice.