Hi, I'm no pro by any means but i would advice going for more wounds in your army. Moreover, tell us what your opponent play, it could help understanding if his list has a big advantage over yours.
That said, the list i usually play at 1K is : warden king, rune lord, 40 warriors, 30 thunderers (or quarellers, whatever you prefer), 10 ironbreakers. It's a really tanky list, especially if you give the 6+ FeelNoPain to the warriors and the 30 shooters can bring death to most threat. If you prefer, you can also give more rend to 1 unit and the warden king ability, +1 wound, really helps to destroy something you really need to focus. The main problem is that you lack mobility. So i got a variant where i only have 20 thunderers and a unit of skywardens/einriggers as kharadron ally, that brings mobility. You have 86-90 wounds on the table with that.