User blog comment:Willbachbakal/(Item Concept) Another Look at Jungle Items/@comment-24862418-20140630070809/@comment-25055899-20140630101055

Adding in energy regen/regaining on any item is a bad idea IMO; they already have fast regen, benefit greatly from blue buff, and all energy using champs have some small built-in energy regen. Your use of Lee Sin as an example is especially bad; if Lee's using all his passive-boosted auto attacks, he'll never drop low on energy, and he can still throw out a full combo (like, say, q into the enemy, then ward-hop w behind them to kick them towards his own team) if he does so with a full energy bar; his costs and regen is all balance. Energy using champs are set up very nicely in that regard; provided you use their built-in energy regen abilities (Lee's passive, following up on Akali's Q, Shen's passive) they won't run out, and are usualyl good throwing out abilities to poke and such even without using their regeneration, provided they don't spam. And even when they do spam, it's not a long time until they're at full energy again.