thanks for the input, ive reworked it and shortened the range of the second firing option.
Burst fire: Template S6
AP 4 Ignores cover(still twin-linked)
Ranged shot: 36 inch range S6
AP 4 Heavy2
It adds a greater deal of balance so its not a "

all Weapon", now it fulfills a more balanced role, which may be a good or bad thing.
as for the chassis rules, its following the current hellhound armor rating, except +1 armor to the front.
The way i see using this vehicle is a spearhead weapons platform, I pondered on giving it an
IG version of the Space marine's Vindicator tanks Siege shield, but i dont know if its fair or is balanced.
the armor and cost stat line is as follows
F-S-R
13 12 10
200 points
im still deciding on the points cost, i think the end result, as its carrying this big heavy flame cannon thats a problem for most of the things itll be going against, the final point cost would be more around 300 points.