For tier1 - no one of them is good.
For tier2 - for more than 2 sites (let say links to 50 tier1 links):
GSA - 100% autopilot (of course captcha breaker and indexer). The price is the best!
Magic submitter - less links, higher price, but the recorder is awesome. (of course captcha breaker and indexer)
UD - it can blast few 1000s links in short period, while GSA can't so fast. (of course captcha breaker and indexer).
If you sell links on sites like Fiverr I will recommend UD.
If you planning to use on your site (tier 2), than GSA whit no doubt.
If you planning to create links from sites, that very less people use than magic submitter, but other tools like zenoposter can do the same.
Regarding UD and out of the question - better than senuke, but I suggest to check licorneAIO, because is must cheaper while is still beta.
For tier1 I recommend Imacro addons (free) and can help for automating tasks with very simple recorder. Also imacros software, which can be found free in the forum.