Recently (sort of) I find out that when I highlight or SPACE BAR Magikills, they couldn't summon spells at the same time anymore as they used to. Thus, making Magikill slower in casting spells at speed rate. I'd like to know why this is happening or is this a fix made by CJ?

They never could.

Can one cast them simultaneously via changing the one you have selected?

Actually I managed to do this on the Stick Wars 2 campaign. Why not online though?

[QUOTE-IHATETHISNAME ]They never could.

They could* like last year and before..

.

I don't even recall this. I think you may have confused how it selects all units, but doesn't actually cast or grant abilities of all units.

Well Chai Matthew, as IHATETHISNAME said...the truth is that yes they never could because they have different properties as other Spell-Casters

Here is an example of the differential of their functions compared to a Marrowkai

Magikill
Lets say you ordered 3 blasts out of range, the first Magikill will begin to travel to cast as the other two will have their orders canceled out (This is the difference you noted).
The reason for this is because in a multi-select, the First Mage must be at least beginning to cast it's spell before the second Mage and the same repeats.

Multi-Magikill System: Mage 1 Ordered (All orders for other mages invalidated until cast of first mage spell)-->Casting-->Mage 2 available-->Ordered (All orders for other mages invalidated until cast of second mage spell)-->Casting-->Availability for next Mage-->System repeats for as many Mages selected.

So according this system, the only way to select multiple spells in a rapid session is to have them cast in range of the spells and hotkey command after the first Mage is casting-->Second-->Repeat...

The problem being is that you usually don't plan spells in range during battle, making this a struggle to use multiple mages correctly when you can only command one "Out of Range" Mage at a time.

Marrowkai
Lets say you ordered 3 of either spell (3 Hell Fists or 3 Reapers) out of range, All three marrows will all instantly go to follow out that command per the 3 exact orders not being stalled waiting for the first Marrow to cast...thus no command is wasted/ignored in the so very important time management of the game (The difference noted once again).

Multi-Marrowkai System: Marrow 1 ordered (Next order for Marrow 2 instantly available)-->Marrow 2 Ordered-->Marrow 3 Ordered-->Repeated for as many Marrows selected.
(Casting is allowed to vary for each Marrow for whenever they are in range of their ordered cast)

To be quite honest, this may be a secret bug that you've pointed out...but I've always thought this was just the way they casted...

I do agree that they should be given the same casting system as marrows

Buddy the mage master here.

And yeah, it never was. Space Bar selects all units, not just mages. For just mages, ctrl + 5.

2 vs 400 is unlikely to cause change.
why does the split second difference affect the outcome of your game?
if your unable to win a game except by massing one unit in particular your quite frankly doing it wrong.
In order you should have a constant idea of what units your opponent has. always keeping pressure on the opponent until you see they have a greater reason for you to move away. you should be using spells conservatively... as support. i dont think it makes much sense to spam the shit out of one spell or several spells in succession. if anything this is a last resort or something fun to do if your opponent happens to be massing.

Are you saying multiple magikill casting the same spell almost simultaneously?
Because one can't cast spells simultaneously...

well I can tell you that u do it with the hot keys q,w, and e for the magikills spells, and u can use those to cast spells faster.

2 vs 400 is unlikely to cause change.

Sorry I don't get what this is about?

But I think it would be helpful, because say I have 2 mages. Mages can make or break an army of similar strength and they can completely decimate units that are slow to run. So being able to cast an E-Wall here and a blast behind him right after is very useful (aka what you do with infernos, trapping them between two dragons or w/e)