Need tips for codex use

I switched from Claude about 5 months ago because the usage limits were terrible, and was blown away by the fact that I never hit my usage limit with Codex. But lately, I've been hitting my 5 hour limit every 30 minutes, and I'm hitting my weekly limit 2-3 days into the week. I've also noticed that it often takes multiple iterations (5+) to fix a bug in my game. I'm using 5.5 high on the plus plan, on the windows codex app.

Are there any tips on how I could save usage, and get this thing to actually work instead of pretending it patched a bug? Maybe a plugin?

I can't afford Pro at the moment, but I might be able to work with another Plus subscription. If I had 2 subscriptions, what would be my workflow?