Forgot to say, thank you very much for your insight, I do hope you answer me back with your thoughts to what I said. I added "unfinished" in the title so nobody else is misleaded.

Hi, divic! Thank you very much for your opinion. The truth is that this guide isn't even close to over, I am still working on at least 7 new chapters. I am new to mobafire and accidentally published it. As you say, teamfights, roaming and warding are definitely some of them. Sorry for misleading you!

To answer your questions, for some reason i have always liked a mana potion on Leona unless i am starting in a jungle camp with my adc. The reason is simple; I feel that river vision can be covered easily by coordinating trinket warding with your adc, and you shouldn't be getting as low as to need 4 health pots with Leona in lane. Although you make a very wise point, just like you said, you "SHOULD" be getting kills with just three engages, however, many times something goes wrong. You miss your E a few times, you get ganked and have to waste everythhing on the jungler, or their support has sustain and you can't get them killed so fast. That's why I feel that sometimes a mana potion is useful. I realize this is somewhat out of the ordinary, and I admit it is only significant in around half of the lanes, but I have tried all alternatives and eventually decided to take this one. When speaking about items, I'll add an explanation.

You don't give much of info. Most of your guide is just chatting about Flash, which is in my opinion pretty obvious summoner spell in the first place. Team fights? roaming? engages? your weak and strong levels? when to go for enemy carry and when to defend your own one? warding? Objective-control, how to make sure that enemy jungler doesn't get early drake by soloing?

Why mana-potion? Terrible value for money and Leona doesn't need that? Like you said, you should be able to get them killed with from one to three engages, running out of mana shouldn't be possible. Failing could lead on hp-problems but hp-potions fix that.

Your primary item-build that's visible on front-page is also extremely odd. You are missing most popular Leona-items and having only armor-items without magic resist and only one hp-item. After 100 armor, you don't get much more damage reduced. 300 or 400, pretty much the same, only few %.