User blog comment:Swag219/Hey guys, can someone tell me Is it worth saving gems for new units?/@comment-28705539-20160711174400

It depends on if you have a good variety of units that expand their setup? (A Good BB Buffer, Spark buffer, mitigator, etc.)

If you're confident that you don't really need to add anyone to your squad since it's good, then I don't see a reason to summon.

But then, the other thing that determines this is your inner urge to pull, hoping that you'll get a good unit.