1) heavy bolters are golden at long range. Flamers are good to, but hordes are generally
CC armies so you want to thin ranks before getting too close
2) while not as good as 4th they are still effective. Assault cannons actually are better against AV14 then lascannons

neither is super effective
BTW. Terminator squads can get 2 of these babies potentially. though the Clyclone missile launcher is better.
3) I second Chaplains feelings
4) Assault squads are ok choices. they are better in Objective missions as they can distract and contest. if they could take melta guns they would be better tankhunters
5) again i second chaplains feelings
6) an assault cannon,
DCCW and heavy flamer is the best all around load out. Venerable with
TL-lascannon and missile launcher is the most accurate gun platform the
SMs can get. Ironclads with 2 flamers are pure win as well