First of all, many thanks to the great feedback and analysis, this is very helpful indeed!
Just to clarify altogether: The restrictions posted apply to all armies (and then, there are those that are specifically Skaven, as they are mentioned with unit names and such). So no army can field more than 35 models per unit or go over 250 Pts. per unit etc.
Now as to adress some questions / unclarities...:
isnt a cannon technically a template weapon? (just a long thin narrow template 60 inches long ) hence with this comp you could bring only a volley gun and a cannon/mortar?
hiss boo tournament organizers!
Exactly; Cannons are template weapons in this tournament (specifically so). Oh yeah, and by the way, Helblasters are, too, if there is an engineer in the same list! But then again, these restrictions are general, so every army only gets to take one template machine, and the dwarven equivalent to our HBVG (don't know the English wording) also counts as a template weapon, as do the goblin doomdivers.
I think you're going to be alright. Skaven are pretty nerfed at this point level and with these comp rules. No screaming bell, no multiple template units, and just one helpit per army. It's been a while since I've looked at the skaven book, so I don't know whether they'll be able to bring a plague furnace... I think they can.
Anyway I know you said that you can't change your list, but I think the hurricanum is a bound spell, not a template warmachine. I think you could still take a cannon. I would also drop the spearman detachment altogether and either put the points towards a cannon, or use the spear as halberds and thicken the parent horde up as much as possible.
In fact, if I'm not mistaken I don't even need fear facing a helpit abomination at all. Hellpits are more than 140 points, right? Then he can't utilize them, as rare choices over 140 points are disallowed altogether. Also, I honestly don't know but thought that a plague furnace always has to be ridden by a plague priest, who is a lord choice - and lords are disallowed, too.
The hurricanium is a template weapon (in the tourney restrictions, at least) as both the hurricanium and the luminark are specifically considered to be a template weapon AND one magic level (out of a max. 3 I can have in the entire army), so indeed, the only combination I could make with any of the buff wagons would be a helblaster. Without an engineer, of course.
And as the unit size capping of 35 models applies to all armies, I couldn't even put more halberds into my unit than I did now, also because they are 240 Pts. as is and may not exceed 250 ; -) but really, I appreciate the advice! I shall like to consider it on a, say, less comped tournament.
The comp indeed is quite heavy in this tournament, but there is a selection of comps considered for all armies, plus specific nerfs for all specific armies (except for Beastmen and High Elves, I believe, who are left - otherwise - unrestricted). Some also get a few reliefs from some restrictions (as Bretons, for instance, get to field more 2+ AS units than the others, or Wood Elves may field more missile troops than anyone else).
I'm the first to say Skaven Are over powered but with those restrictions you'll roll over him.one of the organisers must have been molested by a skaven in his youth with those comps.
As a warning,Chaos will be brutal with those rules,id worry about WoC if there is any...
There is one WoC general there whom I know personally and who plays a hell of an army... And who is really good. Altogether I must say though that the comp on the WoC take a lot of the wind out there, too. Due to the regular restrictions they can't really field more than 15 Warriors in one unit (the unit must never cost more than 250 Pts. after all), and such units are susceptible to Outrider shooting even. Other than that, the barbarians are restricted, in that there may be only one unit that carries flails or great weapons.
I have, by the way, been able to play three test games in my club, one against O&G, one against Lizzies and one against Wood Elves.
I won against the Woods, massacred the Lizzies and drew against the O&G (but that was damn lucky, I got to play against that guy in the 2nd tourney scenario and that was blood and glory, and neither broke the other within all 6 turns, which in the tournament is considered a draw). Other than that, he would've crushed me (I simply hate Squighoppaz. And Doomdivers. I hate them).
I will keep you all updated, of course ; -)