I concur that Wilko Essence mascaras are fantastic. The Purple and Green lash princess are the best IMO. Length and thickness.
Aldi Too Legit mascaras are a good dupe for Benefit They're real, great separation and length but not thickness. Lash sensational Maybelline is also a close match for Benefit.
YSL Faux Cills is gorgeous mascara but it dries out super quickly and can flake, L'oreal lash paradise is a similar product, half the price but half the impact. Estee Lauder Sumptuous is also similar, a bit less impact but more stable. Their double wear is decent too if smudging or flaking is an issue for you, it would last for days if you didn't remove it.
Lancome Mascaras are generally very good too though L'oreal do a version of nearly all of the and are a good cheaper option if you don't need a label.
Personally don't rate Dior or Clinique mascaras at all.
If I wanted a treat I would personally go for
Mac, Chanel or Charlotte Tilbury for lips
Lauder for base
Lauder, benefit or Bobbi Brown for Face powers (blush/bronze/shimmer)
Smashbox, Urban decay and some MAC for eyes
I'd stick with Essence mascara and Soap and Glory brow pencil and I'd happily down grade to MUA for eyes and sleek for face powder if my budget didn't stretch.