[@Zapdos]

The templar's abilities are that of negating magic, sensing magic and of course, fighting with different weapon. Haven't decided yet on a backstory but I'd probably go somewhere within the lines "Land from far, far away where people avoid magic like the plague. Templars were made as a counter weapon against magic users. " My char would've probably been a squire that learned bits and pieces of their anti-magic powers but then *something, not sure yet* happened and they left the templar order to roam the lands.

The Siren is a specialised class of the Bard. Using their magic to convince people, monsters to do things. [Url=https://dndtools.net/classes/siren/]Something like this. [/url]

The Luck mage is the most random of characters. I can do it in two different ways (more but these two are the main ones). 

1. They use a dice to cast magic. They simply need to say what the spell needs to do and then roll the dice. If the roll is a high number, spell works. If it's neutral, nothing happens and if it's a low number, the spell backfires horribly.  The magic can be of any type of magic school and do pretty much anything. Dice can only be used twice a day. 

2. A duelist luck mage. The luck mage has a passive luck field around them which makes them...lucky. An arrow shot by a master archer...is pushed by the wind and just narrowly misses the target. A sword that was sure to stab the char, hits the exact angle where the armor is the strongest. A spear thurst dodged by moving the arm/body whatever at just the right time.