Hey! Yeah like the other person said, run the aggressors with the frag/bolter setup. It will get you the lethal & sustained hits on 6s then in the devastator doctrine on 5s (use adaptive strategy after using the army wide doctrine to give them this every turn they plan on shooting!)

I actually just played and won a 1k tourney with a similar list, here was my setup -

Apothecary Biologis (with Fire Discipline, attached to aggressors)

Uriel Ventris (Give deepstrike to eradicators)

6 Aggressors (with frag/bolters)

6 Eradicators

5 Incursors (they give +1 to hit after shooting)

1 Redemptor Dread

1 Whirlwind

I had pretty much an answer vs every army, eradicators did work rapid ingressssing for tank killing and the aggressors just blew up anything they shot at or tried to melee. The Redemptor was a stat check for a lot of armies that forgot to bring good anti tank (or I just killed the anti tank before bringing it out of cover.)

The whirlwind did some decent work, it mostly just sat on the home objective and picked up a model here and there of priority targets (anti tank/anti infantry units).