This would be a great feature for those who aren't very experienced in killing Zulrah. (Players such as myself)
So basically a Zulrah helper wich shows you where the next spawn will be, if it'll be range/mage/melee/jad and where to stand during that spawn. (A great example would be the Zulrah helper from the Exilent client)
See https://github.com/runelite/runelite/wiki/Rejected-or-Rolled-Back-Features
In-game Zulrah Helper: Removed at Jagex's request (see 1.2.13 blog, relevant discussion in #1386)
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See https://github.com/runelite/runelite/wiki/Rejected-or-Rolled-Back-Features