No because u dont have shsh for 4.3.3, and theres no way u can get it anyway since apple stop providing (signing) 4.3.3 shsh. Your only option is to go 4.3.5 which Apple is providing now and then tethered jb only.

Good luck. Actually not much problem with 4.3.5 tethered, how often would you switch off your ipad anyway? For installation of certain apps and tweaks maybe, but make sure u do it all before leaving far away from your laptop/pc lor... Or u wait till u got access back to ur laptop/pc only download stuffs la.

After all for normal restart reboot just need plug into pc/laptop to boot tethered only, once ON, it's just as good as any jailbroken ipad.

Very well, if you have 4.2.1 shsh, might as well use that one and jb. It's quite stable too.

By the way yours having to boot after lockscreen, it aint supposed to be that way. If i were you i'd re-do again.