However 1v1 the Helstorm will always be more effective- time after time.
Well, it does cost 15 points more.
I still prefer the helblaster, but only in pairs.
I stick them inbetween blocks, so they can't be easily charged. I don't take handgunner detachments because I like to keep my line tight with no weak points, and the helblaster is an excellent replacement for them.
If you look at the maths, the change from 6th to 7th isn't all that bad. People focus on the negatives and forget that it's long range shots went up by a point of strength, the chance of a catastrophic misfire halved, it now gets a +1 large target bonus, and it went down in cost by 15 points. Portent of far works well on it too, if you want a spell for your scroll caddy to use while he hides.
In 6th edition, the helblaster was only really effective at short range, which any opponent worth his salt would absolutely not let happen (mine learned pretty quickly anyway
). Beyond that it was a simple replacement for a unit of handgunners.
It used to ping heavy cavalry and large monsters with strength 4, now it slaughters them with strength 5.
The helblaster has a completely different role to the helstorm anyway... it is now "anti big things" whereas the helstorm is "anti small things"... it's like trying to compare a cannon to a mortar. If anything, the best war machine to compare it to would be the great cannon or DOW cannon.