Anavar or Winstrol seem the obvious choices… with Winstrol being cheap as fuck and easily available (while it wouldn’t be my choice - it may have a synergistic effect with Test due to its affinity for SHBG and Aromatase).
100mg of Primobolan/day with 50-70mg of Proviron a day would be a nice addition to a Test base IMO - but cost increases there.
For ease of aquirement, it would be 75-100mg of Winstrol for 6 weeks IMO.
Why are you looking for just oral for this choice? There are even more injectables that fit your template of non-aromatising, anabolic compounds…
Boldenone - A very mild Anabolic IME, even at 600mg/wk.
Primobolan - 600mg/wk would be a MINIMUM dose, so expensive, especially as pharm grade is recommended.
Masteron - 400-500mg/wk is a good dose for this, it is synergistic with Test - mild in muscle however.
Trenbolone - A must-have addition to increase the anabolism of a cycle with no extra water/estrogen IMO.
Even low dose Nandrolone (200mg), would result in a good increase in muscle, slight water retention (controllable by adex), and gains - that IME - are easily maintained post cycle.