"Power Pole, Extend!"

This is an old thread, but I thought I'd offer some suggestions for future DMs:

Ring of Jumping and the Boots of Springing and Striding both triple your jump distance, giving them greater mobility and allows them to save their ki points for other things. Cape of the Mountebank is also cool.

Amulet of Health, Bracers of Defense, ring/cloak of protection all increase survivability, which are great since you don't wear armor.

Ring of Spell Storing works great if there's spellcasters in the party, pop a Bless or other concentration spell in there, set up some cool combos.

Gauntlets of Ogre Power let's them be a good grappler if they have athletics proficiency.

Wand of Magic Missiles and the Robe of Stars gives them some ranged options if they don't already have them.

At higher levels Staff of Striking, Mace of Disruption, and the Sun Blade are good weapons all monks can use. 

My thoughts exactly 

Here you go - lightning bracers that charge up to give her lightning fists.

https://www.dndbeyond.com/magic-items/3542717-bracers-of-the-lightning-fist