nosferatu1001 wrote:The modifiers stack, however the 4+ to fire at all doesnt - one roll of 4+ satisfies 1+ rules saying "roll a 4+ to fire"
Almost compleetly true if not for one caveat:
Iceshard affects the machine when it fires while pha's works as soon as the template touches the unit, so in this one case he would need to 4+ it twice at different times.
Multiples of the same spell however don't cause multiple rolls. Also shooting that causes autohits (organ gun) rather than a template, allways rolls only once.