Czevraqis: pitch accent help?

I was playing around with revising the !@#$ pitch-accent system in
Czevraqis.  The original version--well, suffice it to say that I found it
more annoying than anything else.

I toyed around with bunches of names (people and place names) and tried to
generalize my "favourite" pitch-accent placements.  It didn't really work,
  but I came up with the following idea:

1.  High tone, low tone.  That's all.  (I'd *like* to do a *real* tonal
conlang someday, though.)

2.  Pitch-accent only occurs within the last 3 syllables of a word (which
means case-endings may alter the placement of accents).  One-syllable
words are unaccented (low tone).

3.  Within the last 3 syllables, the syllable with the "strongest" vowel
in the following hierarchy receives the accent (high tone):
aI>eI>i>a>e>o>u-  (I'm open to suggestions for revision, this was what
sounded best to me offhand; that last is the Japanese "u", the
"upside-down m" in IPA)
If there's a tie, the earlier syllable gets the stress.

===

So, example (using the Ubiquitous Apostrophe after accented syllables)
taken from the conlang relay, since it no longer needs to be Top Secret
and is handy anyway <G>:
(Note: using Kirschenbaum, so * is the alveolar tap.)

Derahat na verahiz, na szaeqazis, [de*a'hat na ve*ahiZ' na SeI'?azis]
ko zekariye narat besaziz, [ko zeka*i'je na'rat besaziZ']
ko szeszezat na mezariz. [ko SeSezat' na mezariZ']

I have no idea if this is feasible or not.  If someone can suggest
alternate schemes for pitch-accenting or examples from natlangs or their
own conlangs, I would be grateful.  I would like it to be visibly regular
(if Japanese or Korean are regular in this regard, I'm too unlettered to
be able to tell...).

YHL