The raid is not even here yet, and Reddit and other Lost Ark communities have been on analyzing how to beat it. The consensus seems to be that the strength lies in the preparation.
Valtan will introduce the first Legion Raid into the western version of Lost Ark.
Legion Raids are difficult team-based activities that require teamwork to understand and enact the strategy necessary to counter each Legion Commander's unique characteristics, abilities, and mechanics.
Valtan is an eight-player Legion raid and introduces a swathe of new mechanics. Players will need to be item level 1415 to complete it on easy mode, or 1445 for the hard mode option.
The recommended engravings are either the 333 or 3331, from the usual optimal engravings, depending on your class. And, while the Valtan raid can be completed with lesser engravings, as this is the first Legion raid, with so many new mechanics and the time it will take to complete it, it's better to give yourself an edge.
The same goes for your gems, which should be at level 5 for your primary abilities, as well as level 3 tripods, as level 4 ones, while useful, are not worth the effort for the difference they make, at this point in the game, if you don't have them already.
The main tip for players, though, is the Purify rune, which is not familiar to a lot of players. It offers a 70% to cleanse a debuff effect, which will prove invaluable in the slog that is a Legion Raid.