I actually find Vagifem irritates a little - well affects my bladder in that I have increased frequency the day I insert it. Sometimes I get a bit of spotting too - but that's probably due to the actual insertion.
The creams are probably best for immediate lubrication and if you can I would ask for both (as I do) - Vagifem and estriol cream but if you're using both I would suggest the weaker 0.01% cream which can be used more liberally around the outer vaginal area rather than Ovestiin which is 1%.
They will all help re comfort during intimacy - especially the creams though Vagifem will lead to plumper tissues which should also lubricate themselves better.
As said - they won't help libido at all but if discomfort was an issue then being more comfortable may help you relax, improving the whole experience

Hurdity x