For an upcoming game, i've had my eyes set on making a Diabolist (The 'pre-nerfed' version released in 2009's Book of the Damned Vol.1). This game is going to level 20 and mythic, meaning I will eventually have access all forms Binding and Planar Ally.
I'll be playing as a Witch Drow, taking 5 levels of witch and going through the prestige class completely (True names will be a thing), and finishing off with 5 more levels of witch. With the Infernal Contract Patron, I have access to all Planar Ally spells and with the Binding Ritual Mythic path ability, i'll have access to the necessary spells for Binding (Circles against alignments, dimensional anchor, etc etc.) As for Mythic Path, i've had my eyes set on Marshal.
With some background covered though, I wanted to talk about Planar Ally and Planar Binding. First and foremost, i've looked through a few guides with the Diabolist, finding which bindings are useful for just what situations. I'm aware of my options and the potential danger of those options.
What i'm not aware of though is the limits that I should impose upon myself with this spell. If I give my Bindings an open ended task and i'm a 15th level caster, they'll follow me around for 15 days. However, being able to spend mythic points as well as spell slots makes the potential of multiple castings per day open, increasing my numbers tremendously! Even without that kind of cheese, daily castings can happen without the mythic points being involved. Even with a single casting per day, that's still fourteen other devils hanging around while the first one checks out!
I want to get the full Diabolist experience and have my own personal squad of troops. But when does it become evident that I summoned one bearded devil too many? As to keep the game running smoothly and to avoid upping the Party's power too much, what's a rough number I should avoid going over?
It's always going to vary by table and/or GM.
Personally I would avoid taking full actions for more than 2 characters, and that includes your PC. I'd say it's ok if you occasionally go over that limit, but I wouldn't do it every time I had a chance.
Having a small army could be fun, but the other players might not like waiting.
PS:I'd talk to the rest of your group. They might not care at all.
Also consider that if you are using RAW Mythic and end up at more than about mythic grade 6 and level 20 Pit fiends are harmless playthings . Summoning can get both very complicated as it uses up lots of table time and pretty useless if using mythic unless your GM lets you bind mythic devils and even then a lot of stock mythic creatures are speedbumps.
But talk to your GM and fellow players to find out what is acceptable. Do make sure though you have full stats for all summoned/bound creatures easily accessible and know their rules so you are as efficient as possible
Thanks for the quick responses! I really appreciate it! As for the players, they're aware that I tend to play a bit more summon-y things (Leshy Warden Druid and Anti-Paladin of Asmodeous with a few in combat assistants.) People are fully aware of my intentions, which is the first step towards success I suppose.
But i'll keep the advice in mind. We do use Roll20 for our games and i've been toying around with some Macros, though, not the best with them. Any advice regarding that is helpful too! So far, I only plan on making macros to do their attacks while tracking their other stats on a handout sheet. If there's a more efficent way of handling their stats and attacks, i'm open to suggestions in that department. Thanks again!
see if your GM will allow you to control a mass of demons as unique swarms/mobs.
pick demons based on a single schtick and stick to it to help speed up play (like just stab with a ice devil and ignore its spell-like abilities) or just summon a sucubus to use its charming/dominate abilities, etc.