I would like to ask you for help...

I have Dreadnought cruiser and on tactical cons slots I have three plasma infusers Mk XI very rare (+28% plasma damage). Does it make sense?

Or will be better to use 2x plasma infuser and one prefire chamber?

My ship's weapons:

Aft: 4x Borg Plasma dual heavy cannons Mk XII
Fore: 4x Borg Plasma turret Mk XI

If you have some other tips for me, please answer. I'm looking forward your advise!

Second thing: Will be any chance to use more tactical bridge officer abilities on this typo of ship? Currently is only Ensign and Lieutenant.... If will be possible to use one Lieutenant commander; will be GREAT!