I'm pretty sure that you can NOT do that for Ragnarok.
Anyone can correct me if I'm wrong but based on my analysis, here is how the game works.
Whenever you start up a fight you have to pay for the requirements first. This means you either pay AP points, raid battle points, Raid event items (in case of events) or in this case, the 1 Ragna raid battle point that refreshes itself every day at login hours.
Don't believe me? Go ahead start up any battle or join a raid. As soon as you got in, exit the battle by clicking on the "Menu" button in the top right corner of your screen and try to exit by "Go to My Page". You can rejoin your battle at any time (unless someone else killed the raid boss if its raid) but you'll notice that your AP/Raid points are already consumed.
As soon as you started up a battle and you've entered it, those payments are as good as gone unless it fulfils both conditions shown below.
1. You're NOT the person who started the battle.
2. You haven't dealt a single point of damage to any enemies in the battle.
This is the reason why if you ended up joining a raid battle that someone else started and you forgot to attack or the boss got killed before you even managed to land a hit, all those Raid points that you first used before you enter got refunded back to you. It is also possible to help out with Andro/Cass on a Union member or a friend who is low on health or needs buffing/debuffing on the raid boss where you can heal/buff them while applying non-damaging debuffs like Sniper shot without spending a single raid point (Technically you need it to enter but it will be refunded).
But considering the fact that starting up raid battles fulfils condition 1 and no one can help you kill the boss to fulfil condition 2 for Advent battles, any raid entry materials or AP that you used WILL BE GONE as soon as you enter these fights.
TL;DR-
This game is not like other games (Eg: FKG) where you can quit/refresh browser cheat and retry a fight until you win.
Because those games consume your entry requirements AFTER the fight and not before.
^(Sure games like FKG have a countermeasure to prevent excessive abuse where the third time you try, it will consume AP upon entering the battle instead, until the penalty cooldown refreshes in 1-2 hours.)