This ^^^^
I regularly play in large theatres, and have yet to struggle with my rig. (Gallien Krueger 1001 RB into a GK 4x10 Neo cab )
I use a wedge monitor for all I need other than my bass sound, and always manage to find a good balance.
Most of the band use in-ears but I just can't be arsed with them TBH. Never yet struggled with hearing myself, and love
the 'live' sound this set up allows. Of course this maybe does n't work for everyone, but for me it's the best solution.
My take is that having a decent backline is always the best approach, meaning I have control over what I hear at all times.
Nothing worse that not having enough level or headroom.
Our engineer is great, and uses a Sansamp Bass Driver to DI into the PA rather than the amp's one, just in case. ( Should
my amp fail, I could no doubt get through the show with just a monitor feed if pushed.)