Well I enter lovis tower around your level which is around 8 or 9 as well, not actually that hard. There are a lot strategies to employ when you face enemies, such as pulling them out 1 by 1 from the crowd and etc.
For entering lovis tower, there is actually 2 entrance to it, where 1 required alot climbing. What I do it run/jump through all skeletons and immediately climb up the ladder to reach a higher platform, then shoot them down 1 by 1 on the higher platform, since those skeletons are not smart enough to climb ladders