I have been training my battle pet Alexondra for some time and her stats are as follows:

Level: 918 Health: 2251 / 2251 Strength: 2268 Defense: 2269 Speed: 2244 Intelligence: 1661 AP: 103

I have almost 400k of exp to spend so what stats should I concentrate on now to maximise her battling potential? I'm so used to evenly training all stats lol. What T11 or T12 weapons should I have or be looking to add to my armoury?

There really is no wrong way to build your pet. Some builds work better for certain opponents than others. Typically, a lot of battlers like to boost health. The more health your pet has, the longer they can last in battle, can absorb crit hits and heal for more per turn when using weapons with a % heal. If you decide to boost strength, you will do more damage per turn and have the potential for battles to end before your opponent can crit hit or freeze you to death. If you decide to boost defense, then it will be a lot harder for opponents to damage you. There may even be a correlation between high defense and the ability to crit hit. If your defense is greater than your opponent is able to attack, then the opponent appears to not be able to crit hit even if their speed is higher. If you boost your pet's speed and it is higher than your opponent's speed, then you can crit hit them and end battles more quickly. Higher speed than your opponent also means your opponents cannot crit hit you.

There are also weapons that scale with your pet's stats. Some scale with tier, while others scale with specific stats like strength or defense. What weapons does your pet currently have?