Sickening is right on with the Ghazghkull comment. 225 pionts for a unit that may come on to the table turn 4 is not fun. ( I wonder if you could use his WAAAAGH when he has not come on the table yet?
YMDC question?)
Battlewagons will have to be possitioned carefully. With no other
AV targets in your list and no
KFF they will be pounded by all your opponents
AV. Hide your sides well, see if you can add a lobba or kannon and make sure you are not assaulted. Personaly I would loose them completely, get a BM with
KFF or
SAG, and add squad of Grots to surround the Lootas
Sluggas would be better of being Shootas. I can't really force myself to write out the reasons now but I will post you a link where someone has done a good job explaining it:
http://www.librarium-online.com/forums/orks/158044-your-favorite-unit-sucks-footslogging-slugga-boyz.html You can find spare points from dropping Ghazghkull, maybe a few Kommandos (you dont need a full unit) and also the
BP s. In squads of 30 you will not be needing them till it doesn't really matter. With those points you can get your Deff koptaz or some looted wagons with Boomguns (only if you are sure you can regularly get them a cover save like with a
KFF).