So I've been playing some Cleric lives recently, and I noticed some things.
There are a lot of junk spells that are more or less unusable. Bull's Strength, Bear's Endurance etc. in particular have pretty much zero functionality.
My Suggestion is simple enough.
Make them increase power with caster level, such that they are always one point behind Cannith Crafting. The purpose of this is fairly straightforward. As a Completionist character, I often find that I want to run R3+ because elite is a joke. However I also want to run with some of the newer players, guildies, alts etc. who find elite to be challenging still.
The idea here is to allow me to buff my adventurer ally, in a way that is more or less useless to other players with dozens of past lives, allowing us to "uplift" a less advanced player and have them function as our highly effective minion.
Keeping the Enhancement Bonus typing, and making the number slightly lower than most gear, we'll be able to take that first life Barbarian friend and have them act as if they have good gear and stats. Or at least... not terrible gear and stats.
The goal is to a) make buff spells interesting and useful again and b) reduce the variance of player statistics in the game by allowing powerful characters to pull the less powerful up to our level for a little while.