Summoners

Untrue, thats because BLM DOES have an Enhancing skill. How else are you able to use Blaze Spikes then? The Healing skill however from a WHM if is not capped, will not rise at all if you are a BLM/WHM. Because Healing magic isnt shared by the two classes, whereas Enhancing does. So Protect can be used to raise your Enhancing as a BLM/WHM because BLM already has an enhancing skill.

Ok Lion I'll go to Midgard. Umm, I'm still pretty confused. Will Summons be used ever to dish out damage? If so, when and at what level? Why? There's enough questions for now....XD

Like they said, summons won't be used to dish out damage until you're level 60-70. Until then, you're either a back-up white mage (or black mage if you so choose, I wouldn't suggest anything else) and at level 30 or so you'll be using them to cast their area buffs. That's about it.

I do not see them ever being BLMs because your elemental skill is capped at half, and fighting things half a lvl from your main is no fun.

You are support, and thats mainly it. You CAN do alot of dmg at low levels, but that costs you your two hour ability and all your MP doing so, it does an area massive damage, around 500 in 40ish lvls. But its not really say consistant until the higher lvls. So pretty much healer and group buffer. Its not crappy buffs...Hasteaga, Fenrir's Elipic Howl, and Aerial Armour(Blinkaga) are real useful.