D&D 5E Need help maxxing out an Arcane Trickster

[ShadowSeeker]

Some good points, but I have to comment on one aspect. You recommend dumping INT, but you are aware that INT sets the DC for disbelieving illusions. Also you recommend considering shocking grasp or ray of frost, which are similarly useless without Int to help them land. Lastly Mage Armor is a whopping 1 AC over what he gets with rogue armor proficiency, so a waste of a pick IMO.

IMO INT is not something you should dump as an arcane trickster.

Acutally I don't recommend to dump int, but just not to boost it. IMO Con and Cha are more important, perhaps even Wis (Save and skills).

Your right with Mage Armor. False Life is a better choice.

Cantrips I would choose: Mage Hand, Messagen, Minor Illusion, Friends or True Strike