The available NG++ test describes Tiel around stealth, Shadow Strike chains, and burst windows. That makes the Shell easier to understand by task than by a naked letter grade: it is a route for players who want to create openings, chain an ambush tool, and convert the opening into pressure.
The same test pairs Tiel with Axe & Dagger and Forgotten Crossbow. That is a specific observed setup, not proof that every other weapon is incompatible. Use it as a starting preset and compare the result against your unlocked equipment and current patch.