So I am going to be moving my halfling rogue to an arcane trickster path for the Mummy's Mask Campaign. I should also note that some things about the character cannot change. His first level is a rogue and his second level is going to be a sorcerer, due to his background that was established prior to making this decision. I took some time off and I will be returning at second level and am coming up with a reason that he all of a sudden has sorcerer powers, plus the wizard doesn't make sense without changing his backstory which isn't possible. His first level feat was weapon finesse, which isn't changing either.
Ability Scores:
STR: 10
DEX: 16
CON: 12
INT: 13
WIS: 10
CHA: 16
I am not a huge fan of min/maxing and am okay if not going to make the most OP Arcane Trickster, I have just never made one before. I am thinking I would like to go down the improved feint route, and the other feats I am thinking about taking are improved initiative, arcane armor training, spell penetration (and greater), spell focus (evocation) and the greater version, and no clue what else. Any advice would be helpful to help me flesh out this character. Also my ability scores can change, I just very seldom drop stats to a negative (20 pt buy).
His background in a nutshell is he grew up in Magnimar listening to stories of the greatest halfling adventurer of all time, Indiana Baggins and wants to take after him. He is a fast talker, gets side tracked very easily, loves to talk about Indiana Baggins and how he will be just like him, and despite his outwards portrayal of confidence is very scared of the Necropolis and everything that goes with it.