Dark Knight stats location?

[TouchandFeel]

Full VIT is the standard safe-bet but at high levels, 30 points equates to very little of your total VIT/HP pool. But every little bit counts in some cases.

STR will increase your agro generation a bit and your damage output a bit, which actually is useful for DRK since it helps MP and HP regen. IMO this is probably the best choice.

PIE is interesting. I tried swapping over to full PIE to see the results and they are somewhat beneficial. It increased my MP pool a good bit, so it can help with making MP management a little easier and if you wanted to do a big burst with lots of DA usage, which in turn can increase dps a bit as well as eHP from self-heals. I'm not fully certain of its value compared to VIT or STR yet. It seems like it could potentially be more useful than VIT(bonus points from levelling, not gear. You still want tons of +VIT from that and in general), but I still feel that STR will be the best option overall.

So short answer, imo STR.

[Syfer22]

*snip*

I always wondered about PIE, thanks for looking into it.

I can see how it would make things more manageable since the abilities scale up in MP cost by level and not max MP amount (I think). One thing to also keep in mind is that, IIRC, MP refreshes at 2% of your max MP in combat so you'll be getting bigger ticks if you invest more in PIE which may help combat the Darkside drain (since I assume that drain is based on level scaling and not MP scaling too, correct me if I'm wrong).