How to guarantee level 3 enchants

new enchanter here, I have invested 10pts enchantment/10 pts material manipulation/20pts pts magical reinforcement to make chest enchants with the intent of specializing in chest enchant.

The only profits are on level 3 enchants (level 1 and 2 are negative), so I am unsure as to where to put my other pts to improve my chance of a level 3 chest enchant and increase my overall profits.

Any tips ?

So, two things to bear in mind for max quality enchants. First, majority of high-end crafts, including consumables like enchants, are 20-30 skill points short of reaching max skill for guaranteed max quality when taking into account all available skill points. This means that for most crafts you either need an inspiration proc (rng) or to use an insight (limited resource) to get max quality.

Second, since enchanting doesn’t use material quality for enchants (only appears on rod and wand crafts), enchanting has a bunch of “extra” skill points as bonuses in unrelated skill specs. While this does mean you don’t have to deal with fiddly and expensive material qualities, you do have to spend nearly twice as much KP to max out one thing compared to other crafters.

So, for maximum possible skill, spec like this:

You will also need max profession level and all rare profession equipment. I would also recommend investing in Inspired Devotion for insight procs, and Resourceful Writ and the last 5 points of Draconic Disenchantment to help with material costs.