Seems you're footslogging your suzerains, those guys are top-three infantry unit in the whole game (having consistent AP2 at initiative), footslogging those means your opponent will focus fire and wipe them out early game before they reach into close combat.
Three jetbikes with heavy bolters will not accomplish much (9 heavy bolter shots from that unit will do nada against other legion, custodes or mechanicum lists, only if your opponent runs solar aux. or militia they will come handy). I suggest you increase these to 6 bikes and run them as skyslayers with volkite culverins, that will give you 24x S6 shots that will be more useful compared to the insignificant heavy bolter shots. These six bikes you fly around and focus on infantry, make sure you stay out of close combat with them, just dance around the enemy units and hose them down with volkite (the are tougher to take out shooting than close combat being T5 2+).
Opponent deep strikers (especially now with the new warmonger consul) will focus on taking out your sicarans early game as they have low AP from sides and rear. I suggest skipping the regular sicaran and do the following changes:
Get a dreadclaw and reduce your suzerains to 8, also give two of them thunder hammers, put your preator and a medic in this squad and put the squad in the dreadclaw. This unit is your universal problem solver. With the dreadclaw they can reach the whole table early game, they are protected against shooting (compared to footslogging across the battlefield) and can threat pretty much anything (landraiders, leviathans, deathstars etc).
Increase your scimitar jetbike squad to six and change them to skyslayers with 6x volkite culverins, these will focus on taking out your opponent's footsloggers.
Also onsider ditching your command rhino too with master of signal and use the points for one or two javelins with twin linked CML, multimelta and 2x hunter killer missiles each if you can fit in the points. The javelins with the above mentioned configuration are more versatile (can threat vehicles, leviathans, heavy and light infantry) and give more bang for the buck compared to a master of signal sitting in a damocles.
Edited by Imren, 18 June 2019 - 08:19 AM.