Here is the scenario (basically the ONLY units I have to work with).
Im trying to balance my army out for well rounded, but competitive fun. (don't mistake competitive for tournament competitive

)
My army at present has a good range of guns and gun types. (Centurion devastators with Grav-cannons for instance, devastator squads with las cannons, lots of bolters, etc). My point being, Im satisfied with the "shooting gallery."
Outside of the few tactical sergeants that have a sword, I have no real H2H,
CC, Rapid assault units.
Attached below Is my thoughts on making 2 units I guess that do just that, and pretty much only that.
By power weapons I mean swords.
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On the command bike squad that should give me the ability to (on one turn).
Move 12"
Shoot Bolters from bikes in shooting phase (relentless), remember the emphasis on these units is NOT shooting.
Assault ~12" or something.
on command, bikes get 2 attacks + 1 for dual weapons + 1 for charging, 4 attacks per bike, 20 total. (hammer of wrath adds + 5 more total?)
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On captains bike, same as above, except thunder hammer, 3 attacks base + 1 for the charge.
Thoughts, advice, or alternate load outs for those units?