Question about Zakum

So I was wondering if its required for you to do the quests before the battle if there's already a person who has the item to summon Zakum? My other question was if you could skip the jump quest either though a door or family teleport. Thanks in advance.

You need to have done all the quests and forge an eye of fire at least once before you can enter the altar at all. If you just try to carry in an eye without doing the quests you will be blocked. But they only need to be done once ever. Beyond that you can enter fine so long as you have an eye on you.

You have to do the jump quest. There is no way around it aside from hacking. What many people I know did was trust their info to a good friend and have that person do it for them.