D&D 5E 3 best adventurers league modules for a Phandalin sandbox

[Islayre d'Argolh]

I'm presently working on a Phandalin sandbox, using the Starter set and the Essentials kit (obviously).
I want to add a few additionnal quests and ressources (especially monsters) to this already dense mini-setting.

A quick resurrection spell because i've just realised that the D&D 5 version of the classic D&D 3 module "the Sunless Citadel", both an Adventurers league module and the first chapter of Tales of the Yawning portal, is officialy located in this area if played in the Forgotten Realms !
Thematically it fits perfectly with LMoP & DoIP : Cult of the Dragon, Blights, Evil druid...

This is really cool