JiffyPopTart
Bree-Yark
Only if you never, ever want to concentrate on a different spell.
No concentration involved in 95% of the uses in my campaign.
Basically, every single skill check outside of combat (with the rare exception EVERYONE makes one at the same time) is guided. Concentration isn't even a minor roadblock. They haven't even start piling on the bard dice on top of it yet, but that will be an even greater headache.