A Model Count and a New Plan

hello

I went Tuesday last week and and traded 3 of the new 7man plaguemarine squad boxes for 24 older style plaguemarines and one chaos terminator. The terminator puts my annihilation force at 51 models so I can use my paired lightning claw chaos lord conversion as a lord and not as a champion in one of the squads. The better find was a couple of the old chaos renegade nurgle marines included in the deal. They don't have the rogue trader style chaos backpacks but i think I have a couple somewhere to add to them. I am debating on whether to add them to my chaos renegades or to add them to the death guard as champions. I also picked up several of the one pose metal plaguemarines that will give a little variety to some of the squads. There were a few of the plastic one pose models(mostly converted to have bolt pistol and close combat weapon) and the remainder were the 2ND edition metal body with plastic arms. I will probably swap the bolt pistol for bolters on the plastic ones and I am contemplating making the majority of the metal bodied one plasma gunners. This will give me over 20+ plasma guns. I was doing some plague tower math and figures if I went with 5 man squads I could put 6 squads with 2 plasma guns each in each plague tower. the plague tower has 10 fire points so 20 rapid fire plasma shot on anything that gets within 12 inches and If the tower stays still it will have 10 plasma shots out to 24 inches. Combined with the towers own weapons I believe that it should be able to sweep just about anything off of an objective and keep it that way. I could optimize the numbers with 30 plasma gunners and I think I have enough bits to do it, but other than it just being wrong , I would only field them all a couple times a year in big apocalypse games.
I have to set down and reorganize my plaguemarine figures. I already had enough models for a battle company before I picked up more models at the GameonGW gameday. A different load for the Plague towers is a twenty man squad and two five man squads. Use the towers as big transports to get the big squads to the objectives and the smaller squads stay on board as point defence. I think this is a little bit more balanced load (with a lot less gun swaps needed) and still a powerful force. It also doesn't smack of a ringer combat load. I admit that 20 rapid fire plasma gun shots lighting up a high point marine squad closing to assault the plague tower leaves me kind of warm inside but the guy on the receiving end will probably not get much enjoyment from the experience.
Either way it is back to the modeling table for a model count and a new plan.