About that pure mage.
Regarding your party:
Fighter: why exactly human? Seems like a Dragonnewt would be better... or a Dwarf... or a Werebeast. Brace is good, it actually interrupts and stops enemy attack sequence (if enemy has 2 attack flurries or more) but...
I chose human because human offers a well-rounded set of stats for str, vit, agi, and luck. Specifically, I like that humans can reach a decently high max str (18) while also maintaining an attractive agi (18). I'll have several options for hitting hard; I wanted a character that would hit hard sooner than later.
Samurai: why Dwarf? 6 max Int will limit his damage spell potential. Of course, it probably won't be his focus, but it seems like a Werebeast or a Dragonnewt would be a better bet. Mysterious Bag... Well I consider it a necessity, but I also like giving Brace to my Samurai. He's a good defender character at late levels due to his Swallow Return counters triggering at random, negating enemy attacks and dealing damage. But they won't always trigger, 50% max, realistically maybe around 30% at high level, so Brace gives him an extra chance to survive - and trigger the parry-counter on next enemy attack. Also... at the final dungeon you''ll really want someone with Swallow Killer Ex skill (sadly costs SP to use), as many dangerous enemies Swallow Return themselves (and often Behead and do other nasty stuff). Although Chi Wave and spells are some alternative.
I avoided Werebeast here because I didn't want a certain notorious PITA powering up off accidental counterattacks. I selected Dwarf rather than Dragonnewt because I didn't care for the additional xp penalty associated with the race. Upon reflection, youre right - statistically, Dragonnewt would likely have been a stronger selection. I may re-roll this character and put mysterious bag on another character.
Dwarf Cleric, Chi Wave - sounds good, but maybe you'd want to teach him other spell school before dedicating his career to the Cleric class?
I should really review the loot table to see if there is -any- reason to keep this character pure.
Hotlet Thief. Ok, I understand you're set on Stealing after level 26? Otherwise a Ninja would be better IMO (Beheading Ahoy + Vigilance 50% enemy ambush avoidance is pretty great). Or a Hunter (Bows are somewhat sucky IMO, but Pursuit/Sweep are pretty sweet). Or even a Bard (CC spells, duh). Life Drain I haven't used, so I can't comment on. Description doesn't sound so hot when enemies are level 100+, but I believe Aweigh said some good things about it, so it must have its uses.
If nothing else, I'd like the -option- to steal. I can always change him to a ninja down the line.
Human Alchemist - sure you don't want to teach him some other spell schools first? An Alchemist is a pretty passive class, I often wished I had a dragonnewts fire breath or something. Divination - one of the most useless EX skill, IMO. When in the crafing menu, you'll see the ore AP anyway. Mysterious Bag candidate?
I'm on the fence here. Long-term, the better play is definitely mysterious bag. Divination is really there to boost my early going by making fewer mining attempts result in rocks. I may well end up retiring this guy at some point to take on a more diversified caster, but I'll carry him for a long time if only because I want to get a competent smith up.
Elf Mage - okay. After my experience I think I'd take Magic Essence instead. CC was more important then nuking - for me. I'd also consider a Fairy to maximize the chances of going first. Then again, they tend to die real fast. Summoner is really nice if you put the effort to capture good monsters (and maybe you make some of them into uber-party members), but again, a very passive class. I often wished he had a dragonnewt breath or something to do.
I understand. I'm really trying to set up this character to get a grasp on how viable a REAL ULTIMATE POWER caster can be. Sooner than later, I'm going to have to make some hard decisions about how I want my party caster composition to be structured. I expect to have a better idea by the time I hit lesser demons; I'll be able to regain lost time pretty swiftly at that point.
IMO don't worry about Innocent status. You can generally find better stuff. It's a non issue IMO.