Why didn't the Pantathians simply create a Rift for the Enemy to come through?

From: Raymond E. Feist
Date: Thu, 14 Dec 1995
Subject: Re: end of the riftwar

Because the Pantathians

1) didn't realize until after the Valheru were imprisoned in the Lifestone that it was rifts that were attracting them back to their original space/time

2) didn't know how to make one until after the Riftwar.