Punching Bag (^_^;)
in general, if you want to try out rules that are not directly supported by software, you should avoid open seats in your games. you can always try to advertise in the forums, though be careful of who you let in ofc. if you have some trustworthy acquaintances, those would be your best shot.
that being said, most of warlight is about destroying the opponents position, so you may want try and alter your rules a bit to accommodate this.
here are some suggestions on changes for your zelda template, to try to make it more practical in warlight terms, to give you some ideas to start with:
1. capture 10 temples = win.
^ my questions here are, what if I have 5 temples, and someone else has 4? what if I capture all 10, but never hold onto all of them at once? it will be hard to enforce these with open seats especially, since people are very unlikely to surrender because of a player made rule. you see plenty of rule breaking from open seat players in diplomacies, and this is without anyone asking them to honor someone else's apparent victory.
even with open seats, you could force everyone to play around the temples, if you gave them higher starting neutrals perhaps (not sure if this is possible), and/or, if you set the bonuses for the temples, to be very high in relation to the other bonuses, such that anyone who controls all the temples, or quite possibly a mere majority of them, would be able to force a win, making most others surrender.
2. use no reinforcement cards except when you eliminate a player.
^ to me, this would also be hard to prevent or enforce, except in more mature groups more interested in roleplay, i suspect. if the reinforcement card is primarily for the ai, why not just give the ai a starting spot with a ton of troops on it, instead? or, why have the ai at all? that adds in a bit of an element of luck, more so than normal. one player could legitimately be outplaying his nearby opponents but get focused on by the ai, while others happily gobble up territories where the ai killed neutrals.