Using blogger conditional tags and how they are viewed by other SE's

I've decided to try and optimize my blogger blog by using the built-in
blogger conditional tags.

What I'm trying to do is have a targeted title, description, and set of
keywords unique to each post.

What i've done so far on my template:

/* This section would only be processed for the main blog page */

<MainOrArchivePage>
<title><$BlogTitle$></title>
<meta name="description" content="My text description would go here"
/>
<meta name="keywords" content="My text keywords would go here" />
</MainOrArchivePage>

/* This section would only be processed for the individual post pages
*/

<Blogger>
<ItemPage>
<BlogItemTitle>
<title>:
<$BlogItemTitle$>
</title>
<meta name="description" content="<$BlogItemTitle$>" />
<meta name="keywords" content="<$BlogItemTitle$>" />
</BlogItemTitle>
</ItemPage>
</Blogger>

In the second example what I'm doing is assigning my blog post title to
the DESCRIPTION meta tag, and also to the KEYWORD tag. My blog post
titles will be created from keywords relating to whatever I happen to
be writing about.

How would other search engines (besides Google) deal with the tags?

>From what I was able to see using a META analysis tool, I'm getting

very high title/description to content relevancy however, some META
analysis sites don't show anything for the DESCRPTION and TITLE tags at
all.

Any suggestions?

What if I also included an additional set of DESCRIPTION/TITLE tags
outside the conditional tags - after or before the code I've listed
above.

Thanks....