Boost isn't a big deal really. Just don't drive like an idiot

. Good varied driving. Stop and go. Don't treat the motor harshly. The oil pressure listed in the manual (you'll note) is VERY low. At idle it lists at something like 4psi. It's a high volume, low pressure system.
I don't understand your desire to run to fuel cut. Those last few PSI gain you very little. It's very near the end of the efficency of the turbo and it's largely blowing hot air, but to each their own.
I wouldn't worry about your engine personally.
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1988 Mk3 Turbo Targa - 17.5psi, 486hp, 494tq.
[img]http://www.**********s.com/supra/rsw_sig_stupidTN.jpg[/img]
Who came up with this 500px wide BS?