[1.1.9.0] Beginner's Lightning Warder this should help you a bit, just adjust to arcanist skills instead of soldier skills. You want storm callers pact for primal strike druid. [1.009 - 1.1.6.2] Lightning God Rises - 5:45m Crucible, SR 75-76, 7s Mad Queen, no greens melee Druid [g3][c+][sr] not totally up to date, but at least 95% accurate on what one should do current patch but should give you the basic idea how to skill and gear it.
Some other MI’s that can be useful except those mentioned and used in dragons guide:
Ascended Epaulets (I just linked the lowest tier version)
Living Ring good elemental damage boost via IEE skill.
Cronley’s Signet (for the bonus attack speed)
Ascended Casque attack speed and armor bonus for the arcanist toggle skill.