Don't take ard boyz. Count all boyz as shootas. Take extra shootaboyz for the points saved from heavy armor. Put boyz + mek in a battlewagon. Don't take meks for lootas if they don't ride in a transport. Zzap gunz on bw-s are sure fun but...the best wagon build is 1bs and a ram - making it a 100pts av14-12-10 open-topped transport. Deff-rollas are awesome on paper or when you meet a land-raider wall but in most games u'll rarely get to use it cause of pre-measurement. But it might work in a small 1k game though.
Kff mek is a solid
HQ for almost every ork list, cept for probably multiple nob-bikers.
That's what i'd do having your current models + some boyz and a few conversions assuming you have no more battlewagons.
Yep, there are not many
pks...but new edition nerfed footslogging so hard - you can't expect to get into close combat with them unless the opponent wants you to be there. So form my experience,
pk nobz in footslogas are only useful when u're facing
mc's that ain't characters.
Multiple battlewagon with shootaboyz with a
pk nob are boss! The more - the better. They're so good - you can compete with tau and sometimes even eldar if u're a good tactitian and lucky! Don't forget, you can put one of the squad's bigshootas on a nob so you don't loose shoota shots and can have precision shots.
Deffkoptas are rather over-costed. Best used in squads of one. And feel free to swap rokkits for bigshootas if you feel that rokkits ain't working for you. Actually, bigshoota ones are not worse, however with only 1
pk i'd have that s8 shots from the back in hopes of blowing up something that can tarpit boyz like an ironclad.
Or you could make nob bikers...but they're very expensive for a 1k pts game, really.
Remember to use battlewagons as a mobile terrain. Block
los on disembarked boyz, protect them from counter-charge, tankshock and divide the opponent's squads so that their overwatch won't be so strong and less models will strike you in mellee. It's all very important cause u'll struggle with closest deaths assuming u'r armor and initiative.