PLANNED MAGIC! - Total War Tactics: Warhammer 2 

I think correct use of spells is much more important than the specific lore. If I have an elite army I may want to buff or heal them, or use nets to protect them or set up ideal engagements for them. if I have a numerical trash-mob army I'd prefer to damage or debuff the enemy. Example, spells that do % increase to armour piercing will do hardly anything if the unit you cast it on only has 2 armour piercing in the first place. There are also some spells that have such minimal effect that I consider them hardly worth the time it takes to click on them, but most lores have at least 1, usually 2 really good flexible spells. Some lores prioritise nuke damage, or direct damage, whereas others like Life or Nehek for example have a good passive 'attribute' that you may want to proc frequently by spamming cheap spells

Thank you for your response kind man. I'm aware of different kinds of spells (buff, debuff, damage armour inf etc..). However, as you said, every lore prioritise different types of spells and has their strengths and also useless circus tricks. And that's where my knowledge is very shallow. I'm indecisive in picking the caster because I simply don't know which spell worth the money. So most of the time it ends up with me not picking any caster and rather using melee heroes, even if i know that magic in WH2 can be game-changing.

that's exactly my "problem" as well, i am not rly interested in the lore part, i am interested in the spels themself

I'd say just experiment

Victor Nightingale there's no real answer to this, you have to play all them yourself..all of them have buff/debuff some are better for AP damage, some good for making your troops tankier, there are others much better for crowd control and also for nuking your opponent, it shouldn't just also be base on your playstyle, I think that's where warhammer differs from the historical ones, all faction are unique not just reskins and a few unique units like the old games, your playstyle will not always work, some faction will counter your playstyle while others it will be their weakness, add magic to it and becomes more complicated..

Depends on if it recharges your reserves or your current pool- You have reserves, which is your total amount of mana to use over the battle, and your pool, which slowly recharges from your reserves. Differing effects will cause the pool to drain the reserves quicker, giving you quicker access to using those spells, while others will add to your reserves. The pool has a cap, so try to use your skills to maximize your reserves, while maybe saving the skills to grow your pool quicker for when you have a low pool in mid battle. If you just spam arcane conduit, you may find yourself with large reserves but running out of your pool when you really need it.

Some of the items/spells you can equip on lords to recharge mana have multi-uses. If it's limited, you should see a small number in a circle on the icon you click to cast it. I like to have two lords using the recharge when possible, you can cast an early spell and pop it to regen, or cast it early if you dont have full mana. I try to keep my mana recharges constantly being used, don't wanna waste any of the winds

Use arcane conduit all the time, from the first second of the game to every time it recharges. As for items, they should be spammed constantly until they run out

This is old, but you wrong. I thought they were useless too, but you can actually direct them somewhat by aiming them like a breath spell, even though the like of indicator would make you think other wise.

Muhammad Syauqi Bin Mohd Asngari yes

knowing it took a chunk of the caster's health?

Muhammad Syauqi Bin Mohd Asngari only if you miscast. There are a few spells., at least in warhammer one, the you would always overcast becuase it could could completely nuke a unit.

Nice. That really satisfying to see.

I rarely do actually.

is there a simple way to tell which spells are effective against which opponents? Most of the time I don't do much damage with my spells. Then occasionally it does a lot. I'll see you in the future!

Generally you would buff your elite units & debuff the enemy's elite units. If I'm bringing a cheap high-numbers army I probably wont buff them much & focus on debuffing especially if the opponent has an elite army eg Chaos. Don't waste spells on trash units unless theres a critical situation. The details are important though, a % increase to armour piercing will have hardly any effect on a unit that only has 2 AP, whereas a flat +27 to melee attack will have a large effect on a poor-melee-attack high-weapon-damage unit such as Kroxigors. Sometimes you can polish your turd, other times its a complete waste

Depends on which specific spells you are comparing.

Or just to use to have magic resistance for your units (if they have it)