MIDEAST STOCKS-Oil rise boosts Saudi, Egypt continues post-devaluation rally

* Zain Saudi surges on hopes for tower sale * Saudi banks underperform after Moody's lowers outlook * Dubai Investments falls after dividend proposal * Kuwait's Agility rises on privatisation hopes * Egypt confirms technical breakout By Andrew Torchia DUBAI, March 16 (Reuters) - Saudi Arabia's stock market rose on Wednesday in response to a surge in oil prices but most of the Gulf was sluggish because of profit-taking. Egypt rallied for a third straight day after the central bank devalued the cu