If you're wanting to get better at PK, you need to be in a lot of fights. Storm sword isn't bad but evil means never having to say you're sorry.

As for dodginess high Dex dodge and evade are going to be better in some situations, but high hp, 25 str for parry with florintine, 25 str giant sized bash, 8 hit flurries, and giant resist bring plenty of positives to the table. There are now and always have been successful giant warriors, and unlike elf warriors they're not made out of glass.

And while it won't be lovey hand holding like in Fortress, Team Empire is usually willing to help each other out with arrogant or grumpy RP in exchange for some gold or a favour. And yeah, Blade powers are pretty good even if you don't get War Master. Codex is str and damroll added, always nice. Shove is very helpful in fights where you're outnumbered or fighting people with charmed mobs like necros or druids. (Not conjurer's though.) Imperial training speaks for itself.

Imperial fire giant, sword/axe. Axe for pincering people with bash protection, and edged overhead isn't bad. Go simple on the legacies. Avalanche for obvious reasons, then something tried and tested like Cry, Soul, Chilling, or Gates.

If you die a lot that's fine. Just keep going, try to learn, and make sure you con die. A build like this, you can be in outfit gear with regear weapons and if you keep searching for fights and run up on folks bash/bash/flurry will net you kills on plenty of unprepped/surprised people.