Lightsaber.

Hmm, I suppose I have another view on staves and spears in ESO, Athan1. But first, based on your description of the type of a Templar you are, I recalled the description of the TES III class of the Crusader - "Any heavily armored warrior with spellcasting powers and a good cause may call himself a Crusader. Crusaders do well by doing good. They hunt monsters and villains, making themselves rich by plunder as they rid the world of evil".

The staves in ESO are not stand-alone blunt weapons or spears like it will be in further Eras, but they represent certain schools of magic, i.e. the Schools of Destruction and Restoration and are no more a blunt weapon. It's just a game mechanic that can't allow us to cast those spells with our bare hands like we did it previously. We see that both schools are taught to crusaders with the School of Destruction being the major skill and the School of Restoration being a minor one. So, since the staves skill lines are just those two certain schools of magic, you can use any of them or both.

Now on to the elements. Sorcerer, Nightblade, Dragon Knight, etc. are neither classes nor estates and not even professions. Here is my definition of those classes: a character's class is a predefined complex of skills and knowledge, a result of a particular course of study which grants a character the ability to perform certain functions within the social division of labour in any system so that a character may specialize in. In other words, character class is a type of education a character acquires. For example, characters with a Sorcerer education can have many professions: a healer, a tank, an enchanter, a soldier, a scholar, etc. It's only the matter of certain skills they use, their views, beliefs and.. some economic demands - the benefits of some educational programs may be changed from patch to a patch. That's it.

So, to be a Templar does not mean you should wield one staff or another, to use only one element avoiding the other. You don't have to choose between fireballs, frostballs or shockballs - an educated specialist in the School of Destruction knows all of those spells and uses them according to the situation his trade requires, whild that trade is chosen according to his personal preferences and capabilities. So, regarding the choice I'd recommend you to choose all the four possible choices and rotate them according to your particular needs. For example I'm a sorcerer there, but I don't cast, say, fireballs and I don't work with electricity, using only several spells of the School of Destruction. But I do utilize the Schools of Conjuration, Illusion, Mysticism and Alteration much and also some weapon skills. It's only up to us to decide, because education grants us the ability to perform our trade, while certain professional skills defind the way we do it, they help us to do it better or to specialize in certain subsphere of it. Tplink3r1 was right, according to the Glories and Laments by Alexandre Hetrard - "The Ayleids considered fire to be but a weak and corrupt form of light, which Ayleid philosophers identified with primary magical principles". But I don't think that the ancient Ayleid views should restrict you from something here. You are already an educated Templar, a Crusader - so use your skills you were taught the way you see it fitting! I vote for "Other".