So I just finished the return to Athanos. Now I can go to Vengard or anywhere else on the high seas. But I saved it before and notice when I go to Vengard I can't sail back again. Do you have to finish the entire Vengard/Faring/Nordmar story to return to the high seas, or can it happen once you get Paladin armour?

Before Vengard, I advise you to sail to the island of Mendoza. After Vengard and Irdorat there will also be an opportunity to sail around the islands and complete some quests.

Is there any other trainer after Wulfias who can teach higher vitality?

No. Wulfias teach max values of HP.

引用自 hedin7：

No. Wulfias teach max values of HP.

When you get to Vengard you end up with so many points and nothing to spend it on, on your playstyle that is.

Also I notice that you don't get 3hp when you give 100 gold to Innos shrines. Was that by design?

Finally what does "Goldsmith" skill do? I notice I have ruby chunks. Is there a special device to goldsmith on? Because it doesn't appear at the anvil or workbench

Jewelry making is necessary to create amulets on the workbench. You can also grind gemstones on a sharpening stone when you are at level 3.

Ich komme von Khorinis nicht mehr auf das Schiff zurück, habe Khorines schon das 2. Mal durch gespielt, hat jemand einen tipp?

Possible, you need finish all missions and quests. You can find description of all quests in pdf on german site.
https://www.worldofgothic.de/download.php?id=1798

引用自 Blitzkrieg (GDR)：

Ich komme von Khorinis nicht mehr auf das Schiff zurück, habe Khorines schon das 2. Mal durch gespielt, hat jemand einen tipp?

The thing that stumped me the most was finding all of Xardas' diarys. You've found the Observatory in the hills behind the Pyramid/Ziggurat yeah?

How many looting orc gangs are there in monterra? Or are there more in another map you have to get for that quest to finish?

You need kill 15 orcs. Possible one of the orcs lost or broke. Check via marvin helper each orc.
command: goto vob OrcScoutMontera_01


var int OrkbandenMyrtanaBesiegt;
if (MIS_OrkbandenMyrtana == LOG_RUNNING)
&& (Npc_GetDistToWP(hero,"WP_R1_K_OUT_01")<9999999999)
&& (OrkbandenMyrtanaBesiegt == FALSE)
{
if (Npc_IsDead(OrcScoutMontera_01))
&& (Npc_IsDead(OrcWarriorMontera_01))
&& (Npc_IsDead(OrcEliteWarriorMontera_01))
&& (Npc_IsDead(OrcScoutMontera_02))
&& (Npc_IsDead(OrcWarriorMontera_02))
&& (Npc_IsDead(OrcEliteWarriorMontera_02))
&& (Npc_IsDead(OrcScoutMontera_03))
&& (Npc_IsDead(OrcWarriorMontera_03))
&& (Npc_IsDead(OrcEliteWarriorMontera_03))
&& (Npc_IsDead(OrcScoutMontera_04))
&& (Npc_IsDead(OrcWarriorMontera_04))
&& (Npc_IsDead(OrcEliteWarriorMontera_04))
&& (Npc_IsDead(OrcScoutMontera_05))
&& (Npc_IsDead(OrcWarriorMontera_05))
&& (Npc_IsDead(OrcEliteWarriorMontera_05))
{
MIS_OrkbandenMyrtana = LOG_SUCCESS;
B_GivePlayerXP (XP_OrkbandenMyrtana);
B_LogEntry (TOPIC_OrkbandenMyrtana,"Ich habe die Orkbanden von Montera unschädlich gemacht.");
//PrintScreen("Plündererbanden besiegt!",-1,40,FONT_Screen,3);
OrkbandenMyrtanaBesiegt = TRUE;
};
};

Thank you so much. I've always wondering if say an NPC that you need to kill for a quest runs off a cliff and dies, does the game still update the quest that you killed it?

Okay so I did the goto vob for every orc on that list and the ONLY one it teleports to is Orc Warrior 04, but there's nothing there to kill. I inserted every orc on the list and killed them all and the quest still doesn't update. Unless this is critical for the main story I should just ignore it. lol have about 12 quests in my log all over the world I can't turn in anyway.

try insert Orc Warrior 04 and kill him.
insert OrcWarriorMontera_04
and check other variables.
(Example: show vars MIS_OrkbandenMyrtana )

it is command of plugin marvin helper. I recommend use this plugin instead of marvin.
Example: For finishing of quest MIS_OrkbandenMyrtana you need make in marvin helper command.
set var MIS_OrkbandenMyrtana 2
1 - running
2 - completed
0 - not started

But better try insert OrcWarriorMontera_04 and kill him.