All enchantments are good, what changes is the objective.
In my opinion making a sword with all the enchants is absurd.
but it's just my opinion, because it requires using an absurd number of enchanted orbs.
Normally we make 3 swords: 1 for grinding, 1 for pvp and 1 for boss world.
But this season, since someone had the bright idea to remove the inventory keep, i agree with you, the boss sword should also needs pvp op.
It wasn't enough, the difficulty of the levels now we still have to worry about thieves. I must say that I don't agree at all with this decision, there is the pvp area in the spawn and the fps, for me it was enough.
But answering your question:
For boss world i use: god sword with Muscular, Rage , Fast turn, coins, thor, nutricion, ice aspect, whend i get in last island i will get galaxy enchants like double damage. for max boss damage you need sword and hunter level, ice wizard max set.
For grinding i use god sword with inquisit, mobslayer. mobheads, headless, coins, stars, nutricion, etc
For pvp (this im not a good adviser because i dont PVP) you need use block, vampire, disarmor, thor, double damege, ice aspect, enchants like that. i realy not good at pvp.
Always protect, secure and imortal.
For a 1 op sword a good max set.
Op sword with a bad set its useless.
So good luck.