Ok, SE. I know some of what I'm about to post has been mentioned before, but I'm going to tidy everything up in a summary here.
Below are some of the improvements that needs to be made to blue mage and the reasons for them.
1) Physical blue mage spells should grant tp.
Dark knight, scholar and black mages have occult acumen. Why shouldn't blue mage? I mean, what's more occult than blue magic?
2) Physical blue mage spells should have the chance to double attack and attack should factor into the damage.
They're physical. Physical damage should have all the physical modifiers attributed, such as attack, critical, and double attack. TP can already be applied to spells using chain affinity. Let's go the rest of the way and include attack, critical, and double attack.
3) Blue mage has too many procs to do in voidwatch.
For the love of all that is right and good, do something about this! How about an ability for blue mage to use any spell in its repertoire for a minute without the need for spells to be set? Actually, how about dual-purposing Unbridled Knowledge to enable such an effect.
4) Give blue mage a spell to protect and shell themselves.
Do I need to explain further?
If you like these improvements then like this post.