I’m on my phone so please forgive the brevity, but Legendary Leader is terribly broken in its current state. Compare it to Foresight (a 9th level spell) and it outperforms it in almost every way and can be done multiple times. A half elf hex blade warlock could have it online by eighth level and essentially have access to an ability more powerful than a spell available at eighteenth. As written, it is stronger than most class capstones. It does not fit 5e as is. Conversion sometimes have to look towards the spirit of something more than just the mechanics. You need to scratch the design and ask yourself what would a Legendary Leader look like in 5e? Honestly, you need to ask yourself that with a lot of your design. You’re hewing to close to the 3.5 paradigm and being to rigid with the initial design. 3.5 was designed to be feat heavy and that design was asking what a fantasy leader would look like in that system. You need to walk away from the prior guides and ask how you would meet the fundamental question in 5e. What does a fantasy leader look like in 5e?
Thanks again for the feedback. I will sit back and think some more about this before the final version goes live.
For the reasons I currently do not think it is broken:
1) you still need a 1-minute speech, so it is not available on a whim.
2) It can be hard at times to stay within 30 feet of each other.
3) It will take most characters 3 ASIs to get it which usually means 8th level at the earliest.
4) It only lasts an hour, which means that there will be many occasions that it does not cover more than one encounter.
5) Most PCs will only have 5 Leadership Performances per day.
6) The bonus action Dodge is taking up the bonus action that the allies might want to use for something else.
7) It costs 2 or 3 ASIs / Feats depending on character build. This is a major sacrifice on the PC's part to boost the party.
8) It does not work on the PC. Only the allies get the benefits.
9) The allies are kept in fireball formation.
10) It can be used against the party by an NPC.
While it has similarities to foresight a spell I have a lot of experience with as a DM (one of the PCs would cast it on the GWM fighter with a Defender greatsword - blender mode activated), there are some significant differences.
1. Allies can still be surprised.
2. It does not cover ability checks.
3. Enemies only have disadvantage on attack rolls if the ally takes Dodge as a bonus action.
4. It only lasts an hour instead of 8.
Right now the design of the Commander archetype and Leader Feats are pretty close to what I want for them in terms of philosophy.
1. They trade personal improvement for the betterment of the team.
2. They can be powerful.
3. They have a high personal cost.
Legendary Leader is also pretty close conceptually to where I envision it. I see a PC with Legendary Leader as being able to coordinate a team to unlock their fullest potential. The team becomes something akin to the Spartans in 300 or the Avengers at the beginning of Age of Ultron. I welcome some thoughts as to how it could be altered. At the moment I would like:
1. To keep the Leadership Performance requirement.
2. To keep the high cost with 2 feats (and maybe an ASI depending on character build).
3. Keep Dodge as a bonus action and the temp HP.
4. Keep some sort of ongoing benefit for the allies being near the leader.
There are two ways I could think of pulling back on Leadership Performance and Legendary Leader
1. Have Legendary Leader require concentration with advantage on maintaining the concentration. The idea being that the benefit is through continuing to give orders and encouragement to everyone nearby, but if that string of commands is broken the effect ends. This makes the Commander a target.
2. Have the benefits of Leadership Performance not stack with Paladin auras. As an example, if the ally is under the effect of your leadership performance and a paladin's aura that provides the same or better bonus to saving throws, they use the paladin's bonus for the saving throw and it does not count against their 5 rolls.