Chest and tris:Good three day split.
What is your routine though?
Bench 5 sets. 3x8 & 2x5 or less on heavier weights.
Dumb bell work after. Flys and incline chest 5x8 maybe some pec dec too.
Tricep machine
overhead dumbbell extensions
Overhead cable extensions.
Same sort of things on the other days really but I haven't done them yet this was my first day back.