Sorry it has taken me so long to get back to this. I will list the ideas I can think of. (I forgot about this topic for a couple of weeks).

I think ter'angreal can naturally be represented by relics and angreal/sa'angreal can be represented by Weapons. Here's a few of the ideas I have for ter'angreal, angreal, and sa'angreal.

1. A ter'angreal that mimics the ability to travel. Gives the general 99 movement points or something similar. I think you've said not all of the factions will have channelers. Those factions with channelers, could be given a single ancillary with this special movement bonus. If I were controlling a faction with channelers and I had a ter'angreal that increased my movement points to 99 (or whatever the limit is) I would give it to my channelers because they are the toughest unit I have and then I could move them anywhere they were needed. Its the closest I think we could come to replicating "traveling" without granting everybody the ability to travel.

2. A ter'angreal that increases line of sight.

3. A ter'angreal that increases attack bonus. (the bonus varies depending on which ter'angreal you find. You can make as many or as few as you want this way).

4. A ter'angreal that increases defense. (the bonus varies depending on which ter'angreal you find).

5. A ter'angreal that gives more hit points to the General's unit. (the bonus varies depending on which ter'angreal you find).

6. A ter'angreal that increase command rating. (the bonus varies depending on which one you find).

7. A ter'angreal that increases influence, and/or management, and/or loyalty. (the bonus varies depending on which one you find).

8. A ter'angreal that greatly increases your defense against channelers and their special magical attacks. My idea is to make a ter'angreal that represents Mat's foxhead medallion. Can we use the idea of how a testudo is immune to arrows and convert it to making whoever holds Mat's Medallion immune to channelers special attacks?

I don't know if any of those ideas can be implemented, but any combination of those extra powers would be awesome.

I'm still brainstorming angreal ideas and sa'angreal. I'll try to come up with something.