Some replies (I've tried to use numbers/headings to make it less dense. Forum reading can be a nightmare!):
(1) Almighty god: You can assume that god is almighty, but you must realise that the entity you then propose exists on a scale of complexity far greater than that of simple theoretical constructs like energy/space/particles. I don't think you can defend rational belief such a divine being in the absence of positive evidence (see below on simplicity).
(2) Fallacies and historicity: I am aware that you did not commit the 'god --> bible --> god' fallacy. I was simply making sure that the discussion would not end up there. And true, if you could find strong evidence for supernatural events in the bible (e.g. resurrection) then this would be potential evidence in favour of god (though note that other explanatory options are still available), but, and correct me if I'm wrong, you did not present such evidence.
(3) Simplicity and razors: Of course simplicity is not synonymous with truth. However, it is important to understand that Ockham's razor does not claim that the most simple theory is the true one. Rather, it claims that the minimal, necessary theory, relative to current knowledge, is the one which it is most reasonable to endorse at this point in time. The problem which arises if you discard this principle is that you have an infinite array of complex theories to choose from, including the many different types of god (as discussed in my previous post) and perhaps also a number of 'god machines' - non-sentient, amoral entities which nonetheless tend to create universes such as ours.
(4) The benefits of faith: You indicate that you are willing to believe in god for the health benefits of faith and because it gives you a psychologically satisfying explanation. I think that's fine if you want to give a pragmatic justification for your belief (in that it is useful for you to believe in god). My arguments, however, are with respect to the intellectual warrants of belief in god, not their practical utility. It may well be useful to believe that one is well liked and respected by some choir of angels (as it may instill happiness, confidence and wellbeing), but it need not, for that very reason, also be true.
There is actually some interesting literature on how positive delusions contribute to our happiness. For example, depressed and 'normal' individuals were asked to play a video game during which they had variable degrees of control (sometimes the computer was actually in control). When asked to rate their degree of control 'normal' subjects overestimated their control of the situation while 'depressed' individuals were very accurate. Similar findings in the literature support the claim that a false sense of control over the world contributes to well-being.
Is it worthwhile to overestimate one's influence on the world? Sure, if you want to be happier. Is this belief therefore true? No.