I'm running a session with modrons and I want them to always roll a 10 on initiative. So far, I've tried various combinations of passive effects using the following keys:

• data.attributes.init.bonus
• data.attributes.init.total
• data.attributes.init.value

But these only seem to modify the d20 roll after it happens, when what I need is to set the final result. Is this something that can be done with a macro?

Mid-write edit. I seem to have come up with a macro that can do something like this, but it kind of works. Anyone have suggestions on how to improve it.

(async () => {
    if (canvas.tokens.controlled.length === 0) return ui.notifications.error("Choose tokens to roll for");
    await canvas.tokens.toggleCombat();
    let chosenTokens = canvas.tokens.controlled;
    let initiatives = chosenTokens.map(t => {
        let chosenActor = t.actor;

        let roll = new Roll(`d20min10max10`);
        roll.toMessage({speaker: ChatMessage.getSpeaker({token: t})});
        let combatantId = game.combat.combatants.find(c => c.name === t.name).rollInitiative('10');
    });
    await game.combat.updateCombatants(initiatives);
})();