I really expected such a thread to appear much earlier. Great to see that the community tries to support the creation of the new spellbooks.
Just a note, there are only 2 spells in the second row. The third row is the one with 4 spells.
Also, I dislike Elrond as a central spell. He isn't really that central for Rivendells gameplay in contrast to Theoden for Rohan (and we added even an element to Theodens spell that affects all heroes), and furthermore there is Arwen too. And the vetarans are too niche, too, for a central spell.
To be honest, we just finished Rivendells (hopefully) final spellbook yesterday. And there are only 3 spells, which were hardly changed at all.
But nothing is ever really finished, so don't let this disturp this thread, as things might change again. And it will definetly be interesting to see in which way our ideas are similar/differ from those of the community.