>>Difficulty of a game is dependent on the DM and the decisions he makes. If he doesn't give you high AC opponents or he doesn't play the creatures at their intelligence level, then it becomes easier.<<
I think the GM played the INT 2 lizards and the desert zombies according to their intelligence level.
BTW we're currently entering a temple likely full of evil clerics, my main worry is failing Will saves.
>> The fact that you "killed 9 out of 12 in a party of 6" in a PBEM indicates that the DM might be fudging rolls as well<<
I have no reason to think the GM is fudging in my favour or against the other PCs. Maybe I'm a better min-maxer than they are (even though I don't have STR 18); I may be the only real warrior PC, the only one with full 1/1 BAB (not sure about the Psychic Warrior) - but all I had to do to 'min max' was give my PC Power Attack with a 2-handed weapon. Where other PCs are doing maybe 6-8 damage a round to opponents with ca 16 hp (if those were regular zombies - 2d12+3, isn't it?), I'm killing with 1 blow, and because I kill in 1 blow I get to Cleave and then do the same again. So in the 5 rounds of combat I killed 9 zombies. If both our Clerics hadn't fled in terror from the Mummy presumably they could have Turned them & blasted them to dust much quicker - although this is a Ravenloft game and their Mummy boss might have been bolstering them I guess, so maybe not. If the zombies are CR 1/2 (and like I said, they were on us in 1 round) then 12 of them would be EL 5, given the support from the Mummy ("Turning" both our Clerics!) it was easily EL 6 per RAW.
>> (you'll note that several people here questioned your effectiveness, it sounds very unusual, even with the data you supplied)<<
I found it striking, hence my post.
As GM I've found Power Attack & Cleave very effective at these levels (the roughly 4-6th range) but it really stands out in this campaign because there are no Arcane casters and no focussed archer types in the party to compare damage output to.
>>Against opponents with AC in the 20 to 24 range (fairly common for 5th level but not apparently in your campaign), your +8, even charging on horseback, should not hit that often. And how do you charge on horseback every single round???<<
I don't - I fought the zombies on foot. The Zeereshi were spread out chasing some other PCs and nothing in the RAW stopped me charging & killing 1 zeereshi each round. I doubt many of the Aryptian priests we're likely about to fight have AC 20+, if they do and I begin missing a lot obviously I'll stop PAing.
I think the GM played the INT 2 lizards and the desert zombies according to their intelligence level.

BTW we're currently entering a temple likely full of evil clerics, my main worry is failing Will saves.
>> The fact that you "killed 9 out of 12 in a party of 6" in a PBEM indicates that the DM might be fudging rolls as well<<
I have no reason to think the GM is fudging in my favour or against the other PCs. Maybe I'm a better min-maxer than they are (even though I don't have STR 18); I may be the only real warrior PC, the only one with full 1/1 BAB (not sure about the Psychic Warrior) - but all I had to do to 'min max' was give my PC Power Attack with a 2-handed weapon. Where other PCs are doing maybe 6-8 damage a round to opponents with ca 16 hp (if those were regular zombies - 2d12+3, isn't it?), I'm killing with 1 blow, and because I kill in 1 blow I get to Cleave and then do the same again. So in the 5 rounds of combat I killed 9 zombies. If both our Clerics hadn't fled in terror from the Mummy presumably they could have Turned them & blasted them to dust much quicker - although this is a Ravenloft game and their Mummy boss might have been bolstering them I guess, so maybe not. If the zombies are CR 1/2 (and like I said, they were on us in 1 round) then 12 of them would be EL 5, given the support from the Mummy ("Turning" both our Clerics!) it was easily EL 6 per RAW.
>> (you'll note that several people here questioned your effectiveness, it sounds very unusual, even with the data you supplied)<<
I found it striking, hence my post.

As GM I've found Power Attack & Cleave very effective at these levels (the roughly 4-6th range) but it really stands out in this campaign because there are no Arcane casters and no focussed archer types in the party to compare damage output to.
>>Against opponents with AC in the 20 to 24 range (fairly common for 5th level but not apparently in your campaign), your +8, even charging on horseback, should not hit that often. And how do you charge on horseback every single round???<<
I don't - I fought the zombies on foot. The Zeereshi were spread out chasing some other PCs and nothing in the RAW stopped me charging & killing 1 zeereshi each round. I doubt many of the Aryptian priests we're likely about to fight have AC 20+, if they do and I begin missing a lot obviously I'll stop PAing.