DL is the hardest child from the household to kill (Signore is the toughest to kill all together). His spells will hit you extremely hard, they will probably one hit you if you don't possess a high mage defense. The charms are as followed: (note: all maxes are like you were sporting Id conceal or something using a high magic defense. If wearing melee armor, expect to get hit at the high 70s with the spells).
Legante's Might: This spell is a standard and strong spell. If no magic protection prayer is on, it will hit up to your 50's. This is his most frequent spell. Keep from magic will usually shield 100%, occasonally it will only protect 75%.
Wave of the Letum: WotL will hit harder than Legante's Might, and can not be protected together with all the mage prayer. He'll strike you with this spell twice, so more than likely, you're DEAD. The only way to prevent this is to TELEGRAB his battlestaff. The telegrabbed staff can't be used, and if you don't get rid of it, DL will just telegrab it back. That means you need to alch it. Low alchemy won't be able to alch the staff, so large alchemy is demanded. This process ought to be done immediatly because he respawns. Not paying attention could cause the death of your team.
Paralyzation: Fairly straight forward, DL will send a wave of electrical magic to youpersonally, and random members of your group. You can still consume food drink potions while frozen, and DL will still attack you.
Earthquake: DL will send an electric shock wave throughout the floor of this tunnel. He'll do things like postage his feet, producing miniature sonic waves. To avoid this, you ought to run to any corner and discover a rubber pole. If you can't go up there quickly enough, you'll get shocked and strike for 40. You can not do anything during this period of time (20 minutes ).