Quest: Ending Their World (9759)

Description:
http://www.wowhead.com/quest=9759/ending-their-world

Current behaviour:

• Quest is missing some details and scripted elements, and is not completed after killing Sironas.
• Demolitionist Legoso walks at an annoyingly slow pace.
• Demolitionist Legoso doesn't always agro nearby creatures.
• The written portion of the script doesn't properly convert $n into your name.
• After the first cluster of bombs goes off, there are no fire effects on the lower half of the Vector Coil.
• There are no electric-style effects coming from the tips of the giant crystals, down into Sironas' hands.
• Sironas isn't in a pose, holding her hands up in the air collecting the energy. She's just standing around.
• When you defeat Sironas the quest is not completed.

Expected behaviour:
https://www.youtube.com/watch?v=4IhYoGu3LZU
super shitty quality but old and looks reliable.

Branch(es): 3.3.5

TC rev. hash/commit: 078b621c746f

TDB version: 335.64

Operating system: Windows 10

No source files, tests, or entry points are named. Start by locating the 3.3.5 implementation for quest 9759 and compare the remaining behaviors with the linked video; done means the remaining Legoso movement and aggro issues, name substitution, and Vector Coil fire effects behave as described.