Talk:Thresh/@comment-26571276-20170512195423/@comment-8506165-20170520103650

...Eye of the Oasis will still sustain your mana, because some of the coins that drop top up your mana rather than give you gold. That said, I'm not sure how you're having late game mana issues on Thresh. His abilities don't cost that much mana.

I tend to build Face of the Mountain, boots, Locket, Redemption, Ruby Sightstone, then a situational item if I get that far, and I rarely go oom lategame as Thresh. Maybe you need to be more sparing with your abilities? Between base mana regen, Redemption and Meditation you should be fine unless you're in a really prolonged fight.