yes, i will help, i know how tough it can be getting a response from someone on here or how long it will take so... you want a Nemisis of level 30?

ok not a problem.

Human Fighter level 30, assume max HP
give it feats such as Mortal-bane dealing an extra 2d6, two weapon fighting, weapon focus battle axe 1D12 each

this way you can easily deal 1d12+2d6 no str mod.

i would sujest for-going the "super strength fighter routine" for a couple of reasons.

one take weapon finesse and buff out your dex con and int if the DM is willing let him use all 18's

this way you have a high AC and HP.

INT you can use for things like Insightful strike, improved critical, keen.

improved critical doesn't stack with other bonuses or modifiers, how ever it doesn't say that others do not stack with it.

lets assume battleaxe has a 20 crit

imrpoved Critical 19 - 20, keen 17 - 20 insightful strike: 13 - 20, increased intelligence will help this using buff's, rings and other magic items or enchantments.

assuming max hp all the way. and using all your ability attributes gained over levels the total +7 modifier to con

10+7 (con) x 30 = 510
if you take the feat improved toughness thats an extra 30hp 540HP
anything extra such as toughness feats only add to the hell, just for kicks your DM could throw on a supernatural ability of fasting healing 10 per round.

if you took toughness for example 23 times thats 69hp +540 = 609HP.