Order Adjusters in Commerce 2
Looking at the \craft\commerce\services\OrderAdjustments you should be able to change the ordering of your adjustments by using the \craft\commerce\services\OrderAdjustments::EVENT_REGISTER_ORDER_ADJUSTERS event.

use craft\events\RegisterComponentTypesEvent;
use craft\commerce\services\OrderAdjustments;
use yii\base\Event;

Event::on(
    OrderAdjustments::class,
    OrderAdjustments::EVENT_REGISTER_ORDER_ADJUSTERS,
    function (RegisterComponentTypesEvent $e) {
        $e-&gt;types = [
            // Add the adjusters in whatever order you want here. Leaving this empty would disable all adjusters.
        ];
    }
);