ASW – Alternative hero leveling.

A comedian? If you played Heroes of Might and Magic, you wouldn't ask such questions.

And what does Heroes of Might and Magic have to do with it? (A few question mark emojis up to China would be nice, as is currently fashionable)

Summoning is:
1) wasps (if they have a decent knockback). Wasps control the enemy very well while high-initiative elves take care of him. And wasps under a rain of spells will give an edge to any Chaos.

Elves already have a hero with wasps, and a lot of them;)

2) mines - no comment

Summoning is not needed for mines.

3) crystal

Even more so.

4) phantoms on blue archers

Blue archers are completely blocked, there will be nowhere for the phantom to spawn.

5) fan - again, a blocker that blocks archers for free

It's not needed.

Summoning for an elf is everything, with the right use of spells.

This means nothing. The elf has 2 tactics - either crush everything in the first rounds or close up, which light and chaos will help with. Don't forget that summoning depends on magic. Chaos too, but there massiveness saves the day.
By the way, only the hive and wasps, which also deal damage, are natural in summoning. Astral and summoning are not light elf traits.