"During the Great Sith War, Exar Kun would raise the ship from the planet and put it back to service, (which is) similar to the way Darth Nihilus would raise the Ravager from the ruined surface of Malachor V."
This is a compound-complex sentence. Or rather, it is now that I fixed the author's terrible shit-tier poop garbage writing. Which reminds me, what ****ing tense is this passage supposed to be in? The preceding sentences are written in past tense, but then this shit is for some reason written in the future tense, which only ****ing retards write in.
Anyway, the first part of this shitty sentence starts off with Exar Kun as the subject, with raising the ship being the verb in question that would complete the independent clause. The subordinate clause is the ship being put back to service. The ship being put back to service is what then necessitates the conjunction "which", that is what "which" is referring to when it says it is similar. The next part of the sentence has one independent clause, Darth Nihilus being the subject, with raising the Ravager as the verb.
Basically, what is being compared here is the ship being put back to service. NOT the ship being raised by Exar Kun. I can understand the confusion, since the writing is frankly poor. The second part of the sentence, to be more consistent, should have read "similar to the way Darth Nihilus put the Ravager back to service after he raised it from the ruined surface of Malachor V."
I hope this helps you nerds.