Hiya! I'm pretty mediocre when it comes to this game so I came her to ask strtegical help.

Here is my inventory: http://imgur.com/m7sSZsc

The synergy I have selected there is the only one I have. The layment configurum is so close to filling up but not yet. I have already cleared every single room except for the boss room, including the secret one thanks to the brick of cash. The only npc on this floor is the salesman but I only have 11 coins. I think that means I have no choice but to go fight the boss.

I am on floor 3 and I only have one heart (two hits and I'm dead).

I really want to know which gun(s) I should use and wether I should drop the homing bullets or the rc bullets.