Cant advice too much, leadership is slow if you can buy "hero" assets (waste AD) they speed it up or look links below and accept that it is slow....
Wiki -page, you can check what task gives most, but list dont calculate what resources are needed and its not take account if produced resources can be used for profit..
Leadership - Official Neverwinter Wiki
Leadership profession task list,
[JavaScript] var taskNameMap = { Leadership : { Leadership_Tier0_Intro_1 : "Hir - Pastebin.com
Open script in Tamper/Greasemonkey and edit profession tasklist. After edit you must "Clear task", "Save task", "Save and Apply" and restart your browser, untill you see changes take effect(I do that twice, IDK why it need to be done several times?)