[Agrajag]

With regards to the paths required to summon, my general opinion on those is:
1) Weak summon - everyone with the paths of the secondary mage should be able to cast it. In this case, it's S2A1
2) Average summon - takes either a lucky secondary mage, or a "base" primary mage. In this case S3E1 or S3F1 or S3E1F1.
3) Good summon - takes a lucky primary mage (or a base primary mage with path boosters). In this case S3E3/S3E2/S3A3/S3A2/S3F3/S3F2/S3W2.
4) Awesome summon - takes a really lucky primary mage, or a lucky primary mage with path boosters. In this case it's S3 + E3/A3/F3/W2 + E3/A3/F3/W2.

As for pretenders, how about a burning bush? Should be immobile (but can teleport) and quite weak, but high astral and fire and dominion.
Maybe S1F1 with Dominion 4 and 40 newpath. Or maybe S2F2 Dominion 2 newpath 30. Or something in the middle.

EDIT: Also, it's very important that the mod will get one of those pictures that is shown when the mod is active!